tetrinode.js

require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
// mock node.js process.on
process = {
  on: function() {}
};
// 'use strict';
var events = require('events');
var Canvas = function() {
  this.blockKeys = false;
  this.bgCanvas = document.getElementById('background');
  this.fgCanvas = document.getElementById('foreground');
  this.bgctx = this.bgCanvas.getContext('2d');
  this.fgctx = this.fgCanvas.getContext('2d');
  this.fgctx.font="20px Georgia";
  //Initial colors
  this.fgctx.fillStyle = '#000066';
  this.bgctx.fillStyle = '#006600';

  //Input
  this.keyMap = {
    '38': 'up',
    '40': 'down',
    '37': 'left',
    '39': 'right',
    '13': 'return',
    '32': 'space'
  };
  this.lastKey = null;
  this.wins = [
    { 
      clear: function() {
        //this.bgCanvas.width = this.bgCanvas.width;
      },
      refresh: function() {
      }
    }
  ];
};

module.exports = Canvas;

Canvas.prototype = new events.EventEmitter();

Canvas.prototype.hello = function() {
  console.log('I\'m browser');
};

Canvas.prototype.startListeningKeyEvents = function() {
  console.log('starting listnening');
  document.addEventListener('keydown', function(e) {
    console.log(e.keyCode);
    if (!this.blockKeys) {
      if (this.keyMap[e.keyCode]) {
        this.emit('keydown', this.keyMap[e.keyCode]);
      }
    }
  }.bind(this), false);
  //TODO: this is candidate to be deleted
  document.addEventListener('keyup', function(e) {
    this.emit('keyup');
  }.bind(this), false);
};

Canvas.prototype.render = function(bg, fg) {
  if (bg) this.printBgObject(bg);
  if (fg) this.printFgObject(fg);
  // requestAnimationFrame(this.render);
};

Canvas.prototype.printBgObject = function(pObject) {
  var posX = pObject.posX || 0;
  var posY = pObject.posY || 0;
  var matrix = pObject.getMatrix() || [0];
  var x = 0, y = 0;
  // Trick to clean canvas faster #performance
  y = matrix.length;
  this.bgCanvas.width = this.bgCanvas.width;
  while (y--) {
    x = matrix[0].length;
    while (x--) {
      if (matrix[y][x] != 0) {
        this.bgctx.fillRect((posX + x) * 10, (posY + y) * 10, 10, 10);
      }
    }
  }
};

Canvas.prototype.printFgObject = function(pObject) {
  var posX = pObject.posX || 0;
  var posY = pObject.posY || 0;
  var matrix = pObject.getMatrix() || [0];
  var x = 0, y = 0;
  // Trick to clean canvas faster #performance
  this.fgCanvas.width = this.fgCanvas.width;
  y = matrix.length;
  while (y--) {
    x = matrix[0].length;
    while (x--) {
      if (matrix[y][x] != 0) {
        this.fgctx.fillRect((posX + x) * 10, (posY + y) * 10, 10, 10);
      }
    }
  }
};

Canvas.prototype.menu = function(options, highlight, x, y) {
  var posX = x || 0;
  var posY = y || 0;
  var selected = highlight || 0;
  var i, msg;
  this.fgCanvas.width = this.fgCanvas.width;
  for (i in options) {
    posY = posY + 2;
    if (selected == i) {
      msg = '>' + options[i].title;
//      this.wins[0].attrset(nc.colorPair(2));
    } else {
//      this.wins[0].attrset(nc.colorPair(1));
      msg = options[i].title;
    }
    this.fgctx.fillText(msg, posX, posY);
  }
//  this.wins[0].refresh();
};


},{"events":13}],2:[function(require,module,exports){
  module.exports = require('./Charm');
if(typeof window == 'object') {
  module.exports = require('./Canvas');
}

},{"./Canvas":1,"./Charm":12}],3:[function(require,module,exports){
'use strict';
var events = require('events');
var Menu = function(display, menuOptions) {
  this.selected = 0;
  this.options = menuOptions;
  this.display = display;
  this.display.startListeningKeyEvents();
  this.display.on('keydown', this.moveCursor.bind(this));
};
Menu.prototype = new events.EventEmitter();
Menu.prototype.show = function() {
  this.display.menu(this.options, this.selected, 0, 0);
};

Menu.prototype.moveCursor = function(key, num) {
  if (key === 'down' && this.selected < this.options.length - 1) {
    this.selected++;
  } else if (key === 'up' && this.selected > 0) {
    this.selected--;
  } else if (key === 'return') {
    this.emit('selection', this.options[this.selected]);
   // this.display.removeAllListeners('keydown');
  }
  this.show();
};

module.exports = Menu;

},{"events":13}],4:[function(require,module,exports){
var process=require("__browserify_process");'use strict';

var Loop = require('lib').Loop;
var Single = function(scr, field, tetro, ghost, loop) {
  this.scr = scr;
  this.field = field;
  this.tetro = tetro;
  this.loop = loop;
  this.fast = 70;
  this.slow = 1000;
  this.action = null;
  this.ghost = ghost;

  // Todo: make this debug info optional
  // this.scr.write(2, 60, 'move L'+t[0] + ':'+ (t[1]*0.000001));

  //this.moveGhost();
  // this.scr.startListeningKeyEvents();
  this.scr.render(this.field, this.tetro, this.ghost);
  this.loop.createInterval(1000, this.gameStep.bind(this));

  //Accelerate the game on Keydown
  this.scr.removeAllListeners('keydown');
  this.scr.on('keydown', (function(key) {
    //block more keys until next step is done
    //this.scr.blockKeys = true;
    if (key === 'space') {
      this.action = 'drop';
    } else {
      this.action = key;
    }
    if (this.loop.speed != this.fast) {
      this.loop.createInterval(this.fast, this.gameStep.bind(this));
    }
  }).bind(this));
  //Slow it down again on keyup
};

Single.prototype.gameStep = function() {
  // Call the function with pressed key name
  var lines;
//  this.moveGhost();
  lines = this.field.clearComplete();
  this.scr.blockKeys = false;
  if (this.action && typeof this[this.action] === 'function') {
    this[this.action]();
    this.action = null;
  } else {
    this.down();
    if (this.loop.speed == this.fast)
      this.loop.createInterval(this.slow, this.gameStep.bind(this));
  }
  this.field.clearComplete()
  process.nextTick(function() {
    this.scr.render(this.field, this.tetro, this.ghost);
  }.bind(this));
};

Single.prototype.c = function() {
  clearInterval(this.loop.interval);
  this.scr.close();
  process.exit(0);
};

Single.prototype.down = function() {
  var randomnumber;
  if (this.field.collideDown(this.tetro)) {
    this.field.update(this.tetro);
    this.tetro.posY = 0;
    this.tetro.posX = 4;
    randomnumber = Math.floor(Math.random() * 7),
    this.tetro.type = randomnumber;
    this.ghost.type = randomnumber;
    this.ghost.posY = this.tetro.posY;
    this.ghost.posX = this.tetro.posX;
    this.dropGhost();
  } else {
    this.tetro.posY++;
  }
};

Single.prototype.up = function() {
  this.tetro.rotate(false);
  this.ghost.posY = this.tetro.posY;
  this.ghost.rotate(false);
  this.dropGhost();
};

Single.prototype.right = function() {
  if (this.field.collideRight(this.tetro) === false) {
    this.tetro.posX++;
    this.ghost.posY = this.tetro.posY;
    this.ghost.posX++;
    this.dropGhost();
  }
};

Single.prototype.left = function() {
  if (this.field.collideLeft(this.tetro) === false) {
    this.tetro.posX = this.tetro.posX - 1;
    this.ghost.posY = this.tetro.posY;
    this.ghost.posX = this.ghost.posX - 1;
    this.dropGhost();
  }
};

Single.prototype.drop = function() {
  this.scr.blockKeys = true;
  while (!this.field.collideDown(this.tetro)) {
    this.tetro.posY++;
  }
};

Single.prototype.dropGhost = function() {
  while (!this.field.collideDown(this.ghost)) { this.ghost.posY++; }
};


module.exports = Single;

},{"__browserify_process":15,"lib":"uM18kj"}],5:[function(require,module,exports){
module.exports.Single = require('./Single.js');

},{"./Single.js":4}],6:[function(require,module,exports){
'use strict';

//Menu loads game mode that exposed in Games/Mode/index.js
module.exports.Menu = require('./Menu');
module.exports.Mode = require('./Mode');

},{"./Menu":3,"./Mode":5}],7:[function(require,module,exports){
'use strict';

/*
 * Loop
 * Game loop class
 */
var Loop = function() {
  this.speed = 0;
  this.interval = null;
  this.keyup = null;
};

module.exports = Loop;

/*
 * createInterval
 * @spped is the timeInterval in miliseconds
 * @logic execute a game step
 * @render render the game
 *
 */
Loop.prototype.createInterval = function(speed, callback) {
  if (this.interval) clearInterval(this.interval);
  this.speed = speed;
  this.interval = setInterval((function() {
    callback();
  }).bind(this), this.speed);
};

},{}],8:[function(require,module,exports){
'use strict';

var events = require('events');
var util = require('util');

var Playfield = function() {
  this.matrix = [];
  this.width = 12;
  this.height = 23;
  this.color = 3;
  var i = this.height;
  while (i--) {
    this.matrix[i] = [];
    var j = this.width;
    while (j--) {
      if (i == (this.height - 1) ||  j === 0 || j == (this.width - 1) ) {
        this.matrix[i][j] = 1;
      } else {
        this.matrix[i][j] = 0;
      }
    }
  }
};

module.exports = Playfield;

Playfield.prototype = new events.EventEmitter();

Playfield.prototype.collideLeft = function(tetri) {
  var tetriMatrix = tetri.getMatrix();
  var i = tetriMatrix.length;
  var len = tetriMatrix[0].length;
  var j;
  while (i--) {
    j = len;
    while (j--) {
      if (tetriMatrix[i][j] > 0 &&
          this.matrix[tetri.posY + i][(tetri.posX - 1) + j] > 0) {
        return true;
      }
    }
  }
  return false;
};

Playfield.prototype.collideRight = function(tetri) {
  var tetriMatrix = tetri.getMatrix();
  var i = tetriMatrix.length;
  var len = tetriMatrix[0].length;
  while (i--) {
    var j = len;
    while (j--) {
      if (tetriMatrix[i][j] > 0 &&
          this.matrix[tetri.posY + i][(tetri.posX + 1) + j] > 0) {
        return true;
      }
    }
  }
  return false;
};

Playfield.prototype.collideDown = function(tetri) {
  var tetriMatrix = tetri.getMatrix();
  var i = tetriMatrix.length;
  var j;
  while (i--) {
    j = tetriMatrix[0].length;
    while (j--) {
      if (tetriMatrix[i][j] > 0 &&
        this.matrix[(tetri.posY + 1) + i][tetri.posX + j] > 0 ) {
        return true;
      }
    }
  }
  return false;
};

Playfield.prototype.collide = function(tetri) {
  var tetriMatrix = tetri.getMatrix();
  var i = tetriMatrix.length;
  var len = tetriMatrix[0].length;
  var collisionPos = [];
  while (i--) {
    var j = len;
    while (j--) {
      if (tetriMatrix[i][j] > 0 &&
          this.matrix[tetri.posY + i] &&
          this.matrix[tetri.posY + i][tetri.posX + j] > 0) {
        return [(tetri.posY + i), (tetri.posX + j)];
      }
    }
  }
  return false;
};

Playfield.prototype.update = function(tetri) {
  var tetriMatrix = tetri.getMatrix();
  var i = tetriMatrix.length;
  var len = tetriMatrix[0].length;
  var rows = tetriMatrix.length;
  var cols;
  // update the matrix
  while (rows--) {
    cols = len;
    while (cols--) {
      if (tetriMatrix[rows][cols] == 1) {
        this.matrix[tetri.posY + rows][tetri.posX + cols] = tetri.type + 1;
      }
    }
  }
  return true;
};

Playfield.prototype.getMatrix = function() {
  return this.matrix;
};

Playfield.prototype.getColor = function() {
  return this.color;
};
/*
Playfield.prototype.clearComplete = function() {
  var i = this.matrix.length - 2;
  var j;
  var lines = [];
  for (i; i >= 1; i--) {
    if (this.matrix[i].indexOf(0) == -1) {
      lines.push(i);
      this.matrix[i] = [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]; //0
      j = i;
      for (j; j >= 1; j--) { this.matrix[j] = this.matrix[j - 1]; }
      //this.matrix[0] = ; //0
    }
  }
};
*/

Playfield.prototype.clearComplete = function() {
  var i = this.matrix.length - 2;
  var count = 0;
  for (i; i >= 1; i--) {
    if (this.matrix[i].indexOf(0) == -1) {
      this.matrix.splice(i, 1);
      count++;
    }
  }
  while (count--) {
    this.matrix.unshift([1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]);
  }
};

},{"events":13,"util":17}],9:[function(require,module,exports){
var events = require('events');
var util = require('util');

var Tetromino = function(pType, pPosX, pPosY) {
  this.posX = pPosX || 5;
  this.posY = pPosY || 0;
  this.colors = [6, 63, 166, 4, 5, 1, 9];
  this.type = pType  || 0;
  this.orientation = 0;
  this.color = 6;
  // SRS rotation system
  this.grid = [
    [
      [[0, 0, 0, 0], [1, 1, 1, 1], [0, 0, 0, 0], [0, 0, 0, 0]], // I 6 pos 3
      [[0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0], [0, 0, 1, 0]], // I 6 pos 1
      [[0, 0, 0, 0], [0, 0, 0, 0], [1, 1, 1, 1], [0, 0, 0, 0]], // I 6 pos 2
      [[0, 1, 0, 0], [0, 1, 0, 0], [0, 1, 0, 0], [0, 1, 0, 0]]  // I 6 pos 3
    ],
    [
      [[1, 0, 0, 0], [1, 1, 1, 0], [0, 0, 0, 0], [0, 0, 0, 0]], // J 63
      [[0, 1, 1, 0], [0, 1, 0, 0], [0, 1, 0, 0], [0, 0, 0, 0]], // J 63
      [[0, 0, 0, 0], [1, 1, 1, 0], [0, 0, 1, 0], [0, 0, 0, 0]], // J 63
      [[0, 1, 0, 0], [0, 1, 0, 0], [1, 1, 0, 0], [0, 0, 0, 0]]  // J 63
    ],
    [
      [[0, 0, 1, 0], [1, 1, 1, 0], [0, 0, 0, 0], [0, 0, 0, 0]], // L 166
      [[0, 1, 0, 0], [0, 1, 0, 0], [0, 1, 1, 0], [0, 0, 0, 0]], // L 166
      [[0, 0, 0, 0], [1, 1, 1, 0], [1, 0, 0, 0], [0, 0, 0, 0]], // L 166
      [[1, 1, 0, 0], [0, 1, 0, 0], [0, 1, 0, 0], [0, 0, 0, 0]]  // L 166
    ],
    [
      [[0, 0, 0, 0], [0, 1, 1, 0], [0, 1, 1, 0], [0, 0, 0, 0]], // O 4
      [[0, 0, 0, 0], [0, 1, 1, 0], [0, 1, 1, 0], [0, 0, 0, 0]], // O 4
      [[0, 0, 0, 0], [0, 1, 1, 0], [0, 1, 1, 0], [0, 0, 0, 0]], // O 4
      [[0, 0, 0, 0], [0, 1, 1, 0], [0, 1, 1, 0], [0, 0, 0, 0]]  // O 4
    ],
    [
      [[0, 1, 1, 0], [1, 1, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]], // S 2
      [[0, 1, 0, 0], [0, 1, 1, 0], [0, 0, 1, 0], [0, 0, 0, 0]], // S 2
      [[0, 0, 0, 0], [0, 1, 1, 0], [1, 1, 0, 0], [0, 0, 0, 0]], // S 2
      [[1, 0, 0, 0], [1, 1, 0, 0], [0, 1, 0, 0], [0, 0, 0, 0]] // S 2
    ],
    [
      [[0, 1, 0, 0], [1, 1, 1, 0], [0, 0, 0, 0], [0, 0, 0, 0]], // T 5
      [[0, 1, 0, 0], [0, 1, 1, 0], [0, 1, 0, 0], [0, 0, 0, 0]], // T 5
      [[0, 0, 0, 0], [1, 1, 1, 0], [0, 1, 0, 0], [0, 0, 0, 0]], // T 5
      [[0, 1, 0, 0], [1, 1, 0, 0], [0, 1, 0, 0], [0, 0, 0, 0]]  // T 5
    ],
    [
      [[1, 1, 0, 0], [0, 1, 1, 0], [0, 0, 0, 0], [0, 0, 0, 0]], // Z 9
      [[0, 0, 1, 0], [0, 1, 1, 0], [0, 1, 0, 0], [0, 0, 0, 0]], // Z 9
      [[0, 0, 0, 0], [1, 1, 0, 0], [0, 1, 1, 0], [0, 0, 0, 0]], // Z 9
      [[0, 1, 0, 0], [1, 1, 0, 0], [1, 0, 0, 0], [0, 0, 0, 0]]  // Z 9
    ]
  ];
};

module.exports = Tetromino;

Tetromino.prototype = new events.EventEmitter();

Tetromino.prototype.rotate = function(pClockWise) {
  if (typeof pClockWise === 'undefined') { pClockWise = true; }
  if (pClockWise === true || pClockWise === 'undefined') {
    this.orientation++;
    if (this.orientation > 3) {
      this.orientation = 0;
    }
  } else if (pClockWise === false) {
    this.orientation--;
    if (this.orientation < 0) {
      this.orientation = 3;
    }
  }
  this.emit('rotating');
};

Tetromino.prototype.getColor = function() {
  return this.colors[this.type];
};

Tetromino.prototype.getMatrix = function() {
  return this.grid[this.type][this.orientation];
};

},{"events":13,"util":17}],"lib":[function(require,module,exports){
module.exports=require('uM18kj');
},{}],"uM18kj":[function(require,module,exports){
'use strict';

module.exports.Display = require('./Display');
module.exports.Playfield = require('./Playfield');
module.exports.Tetromino = require('./Tetromino');
module.exports.Loop = require('./Loop');
module.exports.Game = require('./Game');
module.exports.io = require('socket.io-client');

},{"./Display":2,"./Game":6,"./Loop":7,"./Playfield":8,"./Tetromino":9,"socket.io-client":18}],12:[function(require,module,exports){

},{}],13:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
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// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

function EventEmitter() {
  this._events = this._events || {};
  this._maxListeners = this._maxListeners || undefined;
}
module.exports = EventEmitter;

// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.prototype._events = undefined;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
EventEmitter.defaultMaxListeners = 10;

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function(n) {
  if (!isNumber(n) || n < 0 || isNaN(n))
    throw TypeError('n must be a positive number');
  this._maxListeners = n;
  return this;
};

EventEmitter.prototype.emit = function(type) {
  var er, handler, len, args, i, listeners;

  if (!this._events)
    this._events = {};

  // If there is no 'error' event listener then throw.
  if (type === 'error') {
    if (!this._events.error ||
        (isObject(this._events.error) && !this._events.error.length)) {
      er = arguments[1];
      if (er instanceof Error) {
        throw er; // Unhandled 'error' event
      } else {
        throw TypeError('Uncaught, unspecified "error" event.');
      }
      return false;
    }
  }

  handler = this._events[type];

  if (isUndefined(handler))
    return false;

  if (isFunction(handler)) {
    switch (arguments.length) {
      // fast cases
      case 1:
        handler.call(this);
        break;
      case 2:
        handler.call(this, arguments[1]);
        break;
      case 3:
        handler.call(this, arguments[1], arguments[2]);
        break;
      // slower
      default:
        len = arguments.length;
        args = new Array(len - 1);
        for (i = 1; i < len; i++)
          args[i - 1] = arguments[i];
        handler.apply(this, args);
    }
  } else if (isObject(handler)) {
    len = arguments.length;
    args = new Array(len - 1);
    for (i = 1; i < len; i++)
      args[i - 1] = arguments[i];

    listeners = handler.slice();
    len = listeners.length;
    for (i = 0; i < len; i++)
      listeners[i].apply(this, args);
  }

  return true;
};

EventEmitter.prototype.addListener = function(type, listener) {
  var m;

  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  if (!this._events)
    this._events = {};

  // To avoid recursion in the case that type === "newListener"! Before
  // adding it to the listeners, first emit "newListener".
  if (this._events.newListener)
    this.emit('newListener', type,
              isFunction(listener.listener) ?
              listener.listener : listener);

  if (!this._events[type])
    // Optimize the case of one listener. Don't need the extra array object.
    this._events[type] = listener;
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      this._events[type].warned = true;
      console.error('(node) warning: possible EventEmitter memory ' +
                    'leak detected. %d listeners added. ' +
                    'Use emitter.setMaxListeners() to increase limit.',
                    this._events[type].length);
      console.trace();
    }
  }

  return this;
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.once = function(type, listener) {
  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  var fired = false;

  function g() {
    this.removeListener(type, g);

    if (!fired) {
      fired = true;
      listener.apply(this, arguments);
    }
  }

  g.listener = listener;
  this.on(type, g);

  return this;
};

// emits a 'removeListener' event iff the listener was removed
EventEmitter.prototype.removeListener = function(type, listener) {
  var list, position, length, i;

  if (!isFunction(listener))
    throw TypeError('listener must be a function');

  if (!this._events || !this._events[type])
    return this;

  list = this._events[type];
  length = list.length;
  position = -1;

  if (list === listener ||
      (isFunction(list.listener) && list.listener === listener)) {
    delete this._events[type];
    if (this._events.removeListener)
      this.emit('removeListener', type, listener);

  } else if (isObject(list)) {
    for (i = length; i-- > 0;) {
      if (list[i] === listener ||
          (list[i].listener && list[i].listener === listener)) {
        position = i;
        break;
      }
    }

    if (position < 0)
      return this;

    if (list.length === 1) {
      list.length = 0;
      delete this._events[type];
    } else {
      list.splice(position, 1);
    }

    if (this._events.removeListener)
      this.emit('removeListener', type, listener);
  }

  return this;
};

EventEmitter.prototype.removeAllListeners = function(type) {
  var key, listeners;

  if (!this._events)
    return this;

  // not listening for removeListener, no need to emit
  if (!this._events.removeListener) {
    if (arguments.length === 0)
      this._events = {};
    else if (this._events[type])
      delete this._events[type];
    return this;
  }

  // emit removeListener for all listeners on all events
  if (arguments.length === 0) {
    for (key in this._events) {
      if (key === 'removeListener') continue;
      this.removeAllListeners(key);
    }
    this.removeAllListeners('removeListener');
    this._events = {};
    return this;
  }

  listeners = this._events[type];

  if (isFunction(listeners)) {
    this.removeListener(type, listeners);
  } else {
    // LIFO order
    while (listeners.length)
      this.removeListener(type, listeners[listeners.length - 1]);
  }
  delete this._events[type];

  return this;
};

EventEmitter.prototype.listeners = function(type) {
  var ret;
  if (!this._events || !this._events[type])
    ret = [];
  else if (isFunction(this._events[type]))
    ret = [this._events[type]];
  else
    ret = this._events[type].slice();
  return ret;
};

EventEmitter.listenerCount = function(emitter, type) {
  var ret;
  if (!emitter._events || !emitter._events[type])
    ret = 0;
  else if (isFunction(emitter._events[type]))
    ret = 1;
  else
    ret = emitter._events[type].length;
  return ret;
};

function isFunction(arg) {
  return typeof arg === 'function';
}

function isNumber(arg) {
  return typeof arg === 'number';
}

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}

function isUndefined(arg) {
  return arg === void 0;
}

},{}],14:[function(require,module,exports){
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    ctor.prototype = Object.create(superCtor.prototype, {
      constructor: {
        value: ctor,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    ctor.super_ = superCtor
    var TempCtor = function () {}
    TempCtor.prototype = superCtor.prototype
    ctor.prototype = new TempCtor()
    ctor.prototype.constructor = ctor
  }
}

},{}],15:[function(require,module,exports){
// shim for using process in browser

var process = module.exports = {};

process.nextTick = (function () {
    var canSetImmediate = typeof window !== 'undefined'
    && window.setImmediate;
    var canPost = typeof window !== 'undefined'
    && window.postMessage && window.addEventListener
    ;

    if (canSetImmediate) {
        return function (f) { return window.setImmediate(f) };
    }

    if (canPost) {
        var queue = [];
        window.addEventListener('message', function (ev) {
            var source = ev.source;
            if ((source === window || source === null) && ev.data === 'process-tick') {
                ev.stopPropagation();
                if (queue.length > 0) {
                    var fn = queue.shift();
                    fn();
                }
            }
        }, true);

        return function nextTick(fn) {
            queue.push(fn);
            window.postMessage('process-tick', '*');
        };
    }

    return function nextTick(fn) {
        setTimeout(fn, 0);
    };
})();

process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];

process.binding = function (name) {
    throw new Error('process.binding is not supported');
}

// TODO(shtylman)
process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};

},{}],16:[function(require,module,exports){
module.exports = function isBuffer(arg) {
  return arg && typeof arg === 'object'
    && typeof arg.copy === 'function'
    && typeof arg.fill === 'function'
    && typeof arg.readUInt8 === 'function';
}
},{}],17:[function(require,module,exports){
var process=require("__browserify_process"),global=typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {};// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var formatRegExp = /%[sdj%]/g;
exports.format = function(f) {
  if (!isString(f)) {
    var objects = [];
    for (var i = 0; i < arguments.length; i++) {
      objects.push(inspect(arguments[i]));
    }
    return objects.join(' ');
  }

  var i = 1;
  var args = arguments;
  var len = args.length;
  var str = String(f).replace(formatRegExp, function(x) {
    if (x === '%%') return '%';
    if (i >= len) return x;
    switch (x) {
      case '%s': return String(args[i++]);
      case '%d': return Number(args[i++]);
      case '%j':
        try {
          return JSON.stringify(args[i++]);
        } catch (_) {
          return '[Circular]';
        }
      default:
        return x;
    }
  });
  for (var x = args[i]; i < len; x = args[++i]) {
    if (isNull(x) || !isObject(x)) {
      str += ' ' + x;
    } else {
      str += ' ' + inspect(x);
    }
  }
  return str;
};


// Mark that a method should not be used.
// Returns a modified function which warns once by default.
// If --no-deprecation is set, then it is a no-op.
exports.deprecate = function(fn, msg) {
  // Allow for deprecating things in the process of starting up.
  if (isUndefined(global.process)) {
    return function() {
      return exports.deprecate(fn, msg).apply(this, arguments);
    };
  }

  if (process.noDeprecation === true) {
    return fn;
  }

  var warned = false;
  function deprecated() {
    if (!warned) {
      if (process.throwDeprecation) {
        throw new Error(msg);
      } else if (process.traceDeprecation) {
        console.trace(msg);
      } else {
        console.error(msg);
      }
      warned = true;
    }
    return fn.apply(this, arguments);
  }

  return deprecated;
};


var debugs = {};
var debugEnviron;
exports.debuglog = function(set) {
  if (isUndefined(debugEnviron))
    debugEnviron = process.env.NODE_DEBUG || '';
  set = set.toUpperCase();
  if (!debugs[set]) {
    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
      var pid = process.pid;
      debugs[set] = function() {
        var msg = exports.format.apply(exports, arguments);
        console.error('%s %d: %s', set, pid, msg);
      };
    } else {
      debugs[set] = function() {};
    }
  }
  return debugs[set];
};


/**
 * Echos the value of a value. Trys to print the value out
 * in the best way possible given the different types.
 *
 * @param {Object} obj The object to print out.
 * @param {Object} opts Optional options object that alters the output.
 */
/* legacy: obj, showHidden, depth, colors*/
function inspect(obj, opts) {
  // default options
  var ctx = {
    seen: [],
    stylize: stylizeNoColor
  };
  // legacy...
  if (arguments.length >= 3) ctx.depth = arguments[2];
  if (arguments.length >= 4) ctx.colors = arguments[3];
  if (isBoolean(opts)) {
    // legacy...
    ctx.showHidden = opts;
  } else if (opts) {
    // got an "options" object
    exports._extend(ctx, opts);
  }
  // set default options
  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
  if (isUndefined(ctx.depth)) ctx.depth = 2;
  if (isUndefined(ctx.colors)) ctx.colors = false;
  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
  if (ctx.colors) ctx.stylize = stylizeWithColor;
  return formatValue(ctx, obj, ctx.depth);
}
exports.inspect = inspect;


// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
inspect.colors = {
  'bold' : [1, 22],
  'italic' : [3, 23],
  'underline' : [4, 24],
  'inverse' : [7, 27],
  'white' : [37, 39],
  'grey' : [90, 39],
  'black' : [30, 39],
  'blue' : [34, 39],
  'cyan' : [36, 39],
  'green' : [32, 39],
  'magenta' : [35, 39],
  'red' : [31, 39],
  'yellow' : [33, 39]
};

// Don't use 'blue' not visible on cmd.exe
inspect.styles = {
  'special': 'cyan',
  'number': 'yellow',
  'boolean': 'yellow',
  'undefined': 'grey',
  'null': 'bold',
  'string': 'green',
  'date': 'magenta',
  // "name": intentionally not styling
  'regexp': 'red'
};


function stylizeWithColor(str, styleType) {
  var style = inspect.styles[styleType];

  if (style) {
    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
           '\u001b[' + inspect.colors[style][1] + 'm';
  } else {
    return str;
  }
}


function stylizeNoColor(str, styleType) {
  return str;
}


function arrayToHash(array) {
  var hash = {};

  array.forEach(function(val, idx) {
    hash[val] = true;
  });

  return hash;
}


function formatValue(ctx, value, recurseTimes) {
  // Provide a hook for user-specified inspect functions.
  // Check that value is an object with an inspect function on it
  if (ctx.customInspect &&
      value &&
      isFunction(value.inspect) &&
      // Filter out the util module, it's inspect function is special
      value.inspect !== exports.inspect &&
      // Also filter out any prototype objects using the circular check.
      !(value.constructor && value.constructor.prototype === value)) {
    var ret = value.inspect(recurseTimes, ctx);
    if (!isString(ret)) {
      ret = formatValue(ctx, ret, recurseTimes);
    }
    return ret;
  }

  // Primitive types cannot have properties
  var primitive = formatPrimitive(ctx, value);
  if (primitive) {
    return primitive;
  }

  // Look up the keys of the object.
  var keys = Object.keys(value);
  var visibleKeys = arrayToHash(keys);

  if (ctx.showHidden) {
    keys = Object.getOwnPropertyNames(value);
  }

  // IE doesn't make error fields non-enumerable
  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
  if (isError(value)
      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
    return formatError(value);
  }

  // Some type of object without properties can be shortcutted.
  if (keys.length === 0) {
    if (isFunction(value)) {
      var name = value.name ? ': ' + value.name : '';
      return ctx.stylize('[Function' + name + ']', 'special');
    }
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    }
    if (isDate(value)) {
      return ctx.stylize(Date.prototype.toString.call(value), 'date');
    }
    if (isError(value)) {
      return formatError(value);
    }
  }

  var base = '', array = false, braces = ['{', '}'];

  // Make Array say that they are Array
  if (isArray(value)) {
    array = true;
    braces = ['[', ']'];
  }

  // Make functions say that they are functions
  if (isFunction(value)) {
    var n = value.name ? ': ' + value.name : '';
    base = ' [Function' + n + ']';
  }

  // Make RegExps say that they are RegExps
  if (isRegExp(value)) {
    base = ' ' + RegExp.prototype.toString.call(value);
  }

  // Make dates with properties first say the date
  if (isDate(value)) {
    base = ' ' + Date.prototype.toUTCString.call(value);
  }

  // Make error with message first say the error
  if (isError(value)) {
    base = ' ' + formatError(value);
  }

  if (keys.length === 0 && (!array || value.length == 0)) {
    return braces[0] + base + braces[1];
  }

  if (recurseTimes < 0) {
    if (isRegExp(value)) {
      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
    } else {
      return ctx.stylize('[Object]', 'special');
    }
  }

  ctx.seen.push(value);

  var output;
  if (array) {
    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
  } else {
    output = keys.map(function(key) {
      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
    });
  }

  ctx.seen.pop();

  return reduceToSingleString(output, base, braces);
}


function formatPrimitive(ctx, value) {
  if (isUndefined(value))
    return ctx.stylize('undefined', 'undefined');
  if (isString(value)) {
    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
                                             .replace(/'/g, "\\'")
                                             .replace(/\\"/g, '"') + '\'';
    return ctx.stylize(simple, 'string');
  }
  if (isNumber(value))
    return ctx.stylize('' + value, 'number');
  if (isBoolean(value))
    return ctx.stylize('' + value, 'boolean');
  // For some reason typeof null is "object", so special case here.
  if (isNull(value))
    return ctx.stylize('null', 'null');
}


function formatError(value) {
  return '[' + Error.prototype.toString.call(value) + ']';
}


function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
  var output = [];
  for (var i = 0, l = value.length; i < l; ++i) {
    if (hasOwnProperty(value, String(i))) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          String(i), true));
    } else {
      output.push('');
    }
  }
  keys.forEach(function(key) {
    if (!key.match(/^\d+$/)) {
      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
          key, true));
    }
  });
  return output;
}


function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
  var name, str, desc;
  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
  if (desc.get) {
    if (desc.set) {
      str = ctx.stylize('[Getter/Setter]', 'special');
    } else {
      str = ctx.stylize('[Getter]', 'special');
    }
  } else {
    if (desc.set) {
      str = ctx.stylize('[Setter]', 'special');
    }
  }
  if (!hasOwnProperty(visibleKeys, key)) {
    name = '[' + key + ']';
  }
  if (!str) {
    if (ctx.seen.indexOf(desc.value) < 0) {
      if (isNull(recurseTimes)) {
        str = formatValue(ctx, desc.value, null);
      } else {
        str = formatValue(ctx, desc.value, recurseTimes - 1);
      }
      if (str.indexOf('\n') > -1) {
        if (array) {
          str = str.split('\n').map(function(line) {
            return '  ' + line;
          }).join('\n').substr(2);
        } else {
          str = '\n' + str.split('\n').map(function(line) {
            return '   ' + line;
          }).join('\n');
        }
      }
    } else {
      str = ctx.stylize('[Circular]', 'special');
    }
  }
  if (isUndefined(name)) {
    if (array && key.match(/^\d+$/)) {
      return str;
    }
    name = JSON.stringify('' + key);
    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
      name = name.substr(1, name.length - 2);
      name = ctx.stylize(name, 'name');
    } else {
      name = name.replace(/'/g, "\\'")
                 .replace(/\\"/g, '"')
                 .replace(/(^"|"$)/g, "'");
      name = ctx.stylize(name, 'string');
    }
  }

  return name + ': ' + str;
}


function reduceToSingleString(output, base, braces) {
  var numLinesEst = 0;
  var length = output.reduce(function(prev, cur) {
    numLinesEst++;
    if (cur.indexOf('\n') >= 0) numLinesEst++;
    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
  }, 0);

  if (length > 60) {
    return braces[0] +
           (base === '' ? '' : base + '\n ') +
           ' ' +
           output.join(',\n  ') +
           ' ' +
           braces[1];
  }

  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
}


// NOTE: These type checking functions intentionally don't use `instanceof`
// because it is fragile and can be easily faked with `Object.create()`.
function isArray(ar) {
  return Array.isArray(ar);
}
exports.isArray = isArray;

function isBoolean(arg) {
  return typeof arg === 'boolean';
}
exports.isBoolean = isBoolean;

function isNull(arg) {
  return arg === null;
}
exports.isNull = isNull;

function isNullOrUndefined(arg) {
  return arg == null;
}
exports.isNullOrUndefined = isNullOrUndefined;

function isNumber(arg) {
  return typeof arg === 'number';
}
exports.isNumber = isNumber;

function isString(arg) {
  return typeof arg === 'string';
}
exports.isString = isString;

function isSymbol(arg) {
  return typeof arg === 'symbol';
}
exports.isSymbol = isSymbol;

function isUndefined(arg) {
  return arg === void 0;
}
exports.isUndefined = isUndefined;

function isRegExp(re) {
  return isObject(re) && objectToString(re) === '[object RegExp]';
}
exports.isRegExp = isRegExp;

function isObject(arg) {
  return typeof arg === 'object' && arg !== null;
}
exports.isObject = isObject;

function isDate(d) {
  return isObject(d) && objectToString(d) === '[object Date]';
}
exports.isDate = isDate;

function isError(e) {
  return isObject(e) &&
      (objectToString(e) === '[object Error]' || e instanceof Error);
}
exports.isError = isError;

function isFunction(arg) {
  return typeof arg === 'function';
}
exports.isFunction = isFunction;

function isPrimitive(arg) {
  return arg === null ||
         typeof arg === 'boolean' ||
         typeof arg === 'number' ||
         typeof arg === 'string' ||
         typeof arg === 'symbol' ||  // ES6 symbol
         typeof arg === 'undefined';
}
exports.isPrimitive = isPrimitive;

exports.isBuffer = require('./support/isBuffer');

function objectToString(o) {
  return Object.prototype.toString.call(o);
}


function pad(n) {
  return n < 10 ? '0' + n.toString(10) : n.toString(10);
}


var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
              'Oct', 'Nov', 'Dec'];

// 26 Feb 16:19:34
function timestamp() {
  var d = new Date();
  var time = [pad(d.getHours()),
              pad(d.getMinutes()),
              pad(d.getSeconds())].join(':');
  return [d.getDate(), months[d.getMonth()], time].join(' ');
}


// log is just a thin wrapper to console.log that prepends a timestamp
exports.log = function() {
  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
};


/**
 * Inherit the prototype methods from one constructor into another.
 *
 * The Function.prototype.inherits from lang.js rewritten as a standalone
 * function (not on Function.prototype). NOTE: If this file is to be loaded
 * during bootstrapping this function needs to be rewritten using some native
 * functions as prototype setup using normal JavaScript does not work as
 * expected during bootstrapping (see mirror.js in r114903).
 *
 * @param {function} ctor Constructor function which needs to inherit the
 *     prototype.
 * @param {function} superCtor Constructor function to inherit prototype from.
 */
exports.inherits = require('inherits');

exports._extend = function(origin, add) {
  // Don't do anything if add isn't an object
  if (!add || !isObject(add)) return origin;

  var keys = Object.keys(add);
  var i = keys.length;
  while (i--) {
    origin[keys[i]] = add[keys[i]];
  }
  return origin;
};

function hasOwnProperty(obj, prop) {
  return Object.prototype.hasOwnProperty.call(obj, prop);
}

},{"./support/isBuffer":16,"__browserify_process":15,"inherits":14}],18:[function(require,module,exports){
/*! Socket.IO.js build:0.9.16, development. Copyright(c) 2011 LearnBoost <dev@learnboost.com> MIT Licensed */

var io = ('undefined' === typeof module ? {} : module.exports);
(function() {

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, global) {

  /**
   * IO namespace.
   *
   * @namespace
   */

  var io = exports;

  /**
   * Socket.IO version
   *
   * @api public
   */

  io.version = '0.9.16';

  /**
   * Protocol implemented.
   *
   * @api public
   */

  io.protocol = 1;

  /**
   * Available transports, these will be populated with the available transports
   *
   * @api public
   */

  io.transports = [];

  /**
   * Keep track of jsonp callbacks.
   *
   * @api private
   */

  io.j = [];

  /**
   * Keep track of our io.Sockets
   *
   * @api private
   */
  io.sockets = {};


  /**
   * Manages connections to hosts.
   *
   * @param {String} uri
   * @Param {Boolean} force creation of new socket (defaults to false)
   * @api public
   */

  io.connect = function (host, details) {
    var uri = io.util.parseUri(host)
      , uuri
      , socket;

    if (global && global.location) {
      uri.protocol = uri.protocol || global.location.protocol.slice(0, -1);
      uri.host = uri.host || (global.document
        ? global.document.domain : global.location.hostname);
      uri.port = uri.port || global.location.port;
    }

    uuri = io.util.uniqueUri(uri);

    var options = {
        host: uri.host
      , secure: 'https' == uri.protocol
      , port: uri.port || ('https' == uri.protocol ? 443 : 80)
      , query: uri.query || ''
    };

    io.util.merge(options, details);

    if (options['force new connection'] || !io.sockets[uuri]) {
      socket = new io.Socket(options);
    }

    if (!options['force new connection'] && socket) {
      io.sockets[uuri] = socket;
    }

    socket = socket || io.sockets[uuri];

    // if path is different from '' or /
    return socket.of(uri.path.length > 1 ? uri.path : '');
  };

})('object' === typeof module ? module.exports : (this.io = {}), this);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, global) {

  /**
   * Utilities namespace.
   *
   * @namespace
   */

  var util = exports.util = {};

  /**
   * Parses an URI
   *
   * @author Steven Levithan <stevenlevithan.com> (MIT license)
   * @api public
   */

  var re = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

  var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password',
               'host', 'port', 'relative', 'path', 'directory', 'file', 'query',
               'anchor'];

  util.parseUri = function (str) {
    var m = re.exec(str || '')
      , uri = {}
      , i = 14;

    while (i--) {
      uri[parts[i]] = m[i] || '';
    }

    return uri;
  };

  /**
   * Produces a unique url that identifies a Socket.IO connection.
   *
   * @param {Object} uri
   * @api public
   */

  util.uniqueUri = function (uri) {
    var protocol = uri.protocol
      , host = uri.host
      , port = uri.port;

    if ('document' in global) {
      host = host || document.domain;
      port = port || (protocol == 'https'
        && document.location.protocol !== 'https:' ? 443 : document.location.port);
    } else {
      host = host || 'localhost';

      if (!port && protocol == 'https') {
        port = 443;
      }
    }

    return (protocol || 'http') + '://' + host + ':' + (port || 80);
  };

  /**
   * Mergest 2 query strings in to once unique query string
   *
   * @param {String} base
   * @param {String} addition
   * @api public
   */

  util.query = function (base, addition) {
    var query = util.chunkQuery(base || '')
      , components = [];

    util.merge(query, util.chunkQuery(addition || ''));
    for (var part in query) {
      if (query.hasOwnProperty(part)) {
        components.push(part + '=' + query[part]);
      }
    }

    return components.length ? '?' + components.join('&') : '';
  };

  /**
   * Transforms a querystring in to an object
   *
   * @param {String} qs
   * @api public
   */

  util.chunkQuery = function (qs) {
    var query = {}
      , params = qs.split('&')
      , i = 0
      , l = params.length
      , kv;

    for (; i < l; ++i) {
      kv = params[i].split('=');
      if (kv[0]) {
        query[kv[0]] = kv[1];
      }
    }

    return query;
  };

  /**
   * Executes the given function when the page is loaded.
   *
   *     io.util.load(function () { console.log('page loaded'); });
   *
   * @param {Function} fn
   * @api public
   */

  var pageLoaded = false;

  util.load = function (fn) {
    if ('document' in global && document.readyState === 'complete' || pageLoaded) {
      return fn();
    }

    util.on(global, 'load', fn, false);
  };

  /**
   * Adds an event.
   *
   * @api private
   */

  util.on = function (element, event, fn, capture) {
    if (element.attachEvent) {
      element.attachEvent('on' + event, fn);
    } else if (element.addEventListener) {
      element.addEventListener(event, fn, capture);
    }
  };

  /**
   * Generates the correct `XMLHttpRequest` for regular and cross domain requests.
   *
   * @param {Boolean} [xdomain] Create a request that can be used cross domain.
   * @returns {XMLHttpRequest|false} If we can create a XMLHttpRequest.
   * @api private
   */

  util.request = function (xdomain) {

    if (xdomain && 'undefined' != typeof XDomainRequest && !util.ua.hasCORS) {
      return new XDomainRequest();
    }

    if ('undefined' != typeof XMLHttpRequest && (!xdomain || util.ua.hasCORS)) {
      return new XMLHttpRequest();
    }

    if (!xdomain) {
      try {
        return new window[(['Active'].concat('Object').join('X'))]('Microsoft.XMLHTTP');
      } catch(e) { }
    }

    return null;
  };

  /**
   * XHR based transport constructor.
   *
   * @constructor
   * @api public
   */

  /**
   * Change the internal pageLoaded value.
   */

  if ('undefined' != typeof window) {
    util.load(function () {
      pageLoaded = true;
    });
  }

  /**
   * Defers a function to ensure a spinner is not displayed by the browser
   *
   * @param {Function} fn
   * @api public
   */

  util.defer = function (fn) {
    if (!util.ua.webkit || 'undefined' != typeof importScripts) {
      return fn();
    }

    util.load(function () {
      setTimeout(fn, 100);
    });
  };

  /**
   * Merges two objects.
   *
   * @api public
   */

  util.merge = function merge (target, additional, deep, lastseen) {
    var seen = lastseen || []
      , depth = typeof deep == 'undefined' ? 2 : deep
      , prop;

    for (prop in additional) {
      if (additional.hasOwnProperty(prop) && util.indexOf(seen, prop) < 0) {
        if (typeof target[prop] !== 'object' || !depth) {
          target[prop] = additional[prop];
          seen.push(additional[prop]);
        } else {
          util.merge(target[prop], additional[prop], depth - 1, seen);
        }
      }
    }

    return target;
  };

  /**
   * Merges prototypes from objects
   *
   * @api public
   */

  util.mixin = function (ctor, ctor2) {
    util.merge(ctor.prototype, ctor2.prototype);
  };

  /**
   * Shortcut for prototypical and static inheritance.
   *
   * @api private
   */

  util.inherit = function (ctor, ctor2) {
    function f() {};
    f.prototype = ctor2.prototype;
    ctor.prototype = new f;
  };

  /**
   * Checks if the given object is an Array.
   *
   *     io.util.isArray([]); // true
   *     io.util.isArray({}); // false
   *
   * @param Object obj
   * @api public
   */

  util.isArray = Array.isArray || function (obj) {
    return Object.prototype.toString.call(obj) === '[object Array]';
  };

  /**
   * Intersects values of two arrays into a third
   *
   * @api public
   */

  util.intersect = function (arr, arr2) {
    var ret = []
      , longest = arr.length > arr2.length ? arr : arr2
      , shortest = arr.length > arr2.length ? arr2 : arr;

    for (var i = 0, l = shortest.length; i < l; i++) {
      if (~util.indexOf(longest, shortest[i]))
        ret.push(shortest[i]);
    }

    return ret;
  };

  /**
   * Array indexOf compatibility.
   *
   * @see bit.ly/a5Dxa2
   * @api public
   */

  util.indexOf = function (arr, o, i) {

    for (var j = arr.length, i = i < 0 ? i + j < 0 ? 0 : i + j : i || 0;
         i < j && arr[i] !== o; i++) {}

    return j <= i ? -1 : i;
  };

  /**
   * Converts enumerables to array.
   *
   * @api public
   */

  util.toArray = function (enu) {
    var arr = [];

    for (var i = 0, l = enu.length; i < l; i++)
      arr.push(enu[i]);

    return arr;
  };

  /**
   * UA / engines detection namespace.
   *
   * @namespace
   */

  util.ua = {};

  /**
   * Whether the UA supports CORS for XHR.
   *
   * @api public
   */

  util.ua.hasCORS = 'undefined' != typeof XMLHttpRequest && (function () {
    try {
      var a = new XMLHttpRequest();
    } catch (e) {
      return false;
    }

    return a.withCredentials != undefined;
  })();

  /**
   * Detect webkit.
   *
   * @api public
   */

  util.ua.webkit = 'undefined' != typeof navigator
    && /webkit/i.test(navigator.userAgent);

   /**
   * Detect iPad/iPhone/iPod.
   *
   * @api public
   */

  util.ua.iDevice = 'undefined' != typeof navigator
      && /iPad|iPhone|iPod/i.test(navigator.userAgent);

})('undefined' != typeof io ? io : module.exports, this);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

  /**
   * Expose constructor.
   */

  exports.EventEmitter = EventEmitter;

  /**
   * Event emitter constructor.
   *
   * @api public.
   */

  function EventEmitter () {};

  /**
   * Adds a listener
   *
   * @api public
   */

  EventEmitter.prototype.on = function (name, fn) {
    if (!this.$events) {
      this.$events = {};
    }

    if (!this.$events[name]) {
      this.$events[name] = fn;
    } else if (io.util.isArray(this.$events[name])) {
      this.$events[name].push(fn);
    } else {
      this.$events[name] = [this.$events[name], fn];
    }

    return this;
  };

  EventEmitter.prototype.addListener = EventEmitter.prototype.on;

  /**
   * Adds a volatile listener.
   *
   * @api public
   */

  EventEmitter.prototype.once = function (name, fn) {
    var self = this;

    function on () {
      self.removeListener(name, on);
      fn.apply(this, arguments);
    };

    on.listener = fn;
    this.on(name, on);

    return this;
  };

  /**
   * Removes a listener.
   *
   * @api public
   */

  EventEmitter.prototype.removeListener = function (name, fn) {
    if (this.$events && this.$events[name]) {
      var list = this.$events[name];

      if (io.util.isArray(list)) {
        var pos = -1;

        for (var i = 0, l = list.length; i < l; i++) {
          if (list[i] === fn || (list[i].listener && list[i].listener === fn)) {
            pos = i;
            break;
          }
        }

        if (pos < 0) {
          return this;
        }

        list.splice(pos, 1);

        if (!list.length) {
          delete this.$events[name];
        }
      } else if (list === fn || (list.listener && list.listener === fn)) {
        delete this.$events[name];
      }
    }

    return this;
  };

  /**
   * Removes all listeners for an event.
   *
   * @api public
   */

  EventEmitter.prototype.removeAllListeners = function (name) {
    if (name === undefined) {
      this.$events = {};
      return this;
    }

    if (this.$events && this.$events[name]) {
      this.$events[name] = null;
    }

    return this;
  };

  /**
   * Gets all listeners for a certain event.
   *
   * @api publci
   */

  EventEmitter.prototype.listeners = function (name) {
    if (!this.$events) {
      this.$events = {};
    }

    if (!this.$events[name]) {
      this.$events[name] = [];
    }

    if (!io.util.isArray(this.$events[name])) {
      this.$events[name] = [this.$events[name]];
    }

    return this.$events[name];
  };

  /**
   * Emits an event.
   *
   * @api public
   */

  EventEmitter.prototype.emit = function (name) {
    if (!this.$events) {
      return false;
    }

    var handler = this.$events[name];

    if (!handler) {
      return false;
    }

    var args = Array.prototype.slice.call(arguments, 1);

    if ('function' == typeof handler) {
      handler.apply(this, args);
    } else if (io.util.isArray(handler)) {
      var listeners = handler.slice();

      for (var i = 0, l = listeners.length; i < l; i++) {
        listeners[i].apply(this, args);
      }
    } else {
      return false;
    }

    return true;
  };

})(
    'undefined' != typeof io ? io : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
);

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

/**
 * Based on JSON2 (http://www.JSON.org/js.html).
 */

(function (exports, nativeJSON) {
  "use strict";

  // use native JSON if it's available
  if (nativeJSON && nativeJSON.parse){
    return exports.JSON = {
      parse: nativeJSON.parse
    , stringify: nativeJSON.stringify
    };
  }

  var JSON = exports.JSON = {};

  function f(n) {
      // Format integers to have at least two digits.
      return n < 10 ? '0' + n : n;
  }

  function date(d, key) {
    return isFinite(d.valueOf()) ?
        d.getUTCFullYear()     + '-' +
        f(d.getUTCMonth() + 1) + '-' +
        f(d.getUTCDate())      + 'T' +
        f(d.getUTCHours())     + ':' +
        f(d.getUTCMinutes())   + ':' +
        f(d.getUTCSeconds())   + 'Z' : null;
  };

  var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
      escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
      gap,
      indent,
      meta = {    // table of character substitutions
          '\b': '\\b',
          '\t': '\\t',
          '\n': '\\n',
          '\f': '\\f',
          '\r': '\\r',
          '"' : '\\"',
          '\\': '\\\\'
      },
      rep;


  function quote(string) {

// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.

      escapable.lastIndex = 0;
      return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
          var c = meta[a];
          return typeof c === 'string' ? c :
              '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
      }) + '"' : '"' + string + '"';
  }


  function str(key, holder) {

// Produce a string from holder[key].

      var i,          // The loop counter.
          k,          // The member key.
          v,          // The member value.
          length,
          mind = gap,
          partial,
          value = holder[key];

// If the value has a toJSON method, call it to obtain a replacement value.

      if (value instanceof Date) {
          value = date(key);
      }

// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.

      if (typeof rep === 'function') {
          value = rep.call(holder, key, value);
      }

// What happens next depends on the value's type.

      switch (typeof value) {
      case 'string':
          return quote(value);

      case 'number':

// JSON numbers must be finite. Encode non-finite numbers as null.

          return isFinite(value) ? String(value) : 'null';

      case 'boolean':
      case 'null':

// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.

          return String(value);

// If the type is 'object', we might be dealing with an object or an array or
// null.

      case 'object':

// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.

          if (!value) {
              return 'null';
          }

// Make an array to hold the partial results of stringifying this object value.

          gap += indent;
          partial = [];

// Is the value an array?

          if (Object.prototype.toString.apply(value) === '[object Array]') {

// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.

              length = value.length;
              for (i = 0; i < length; i += 1) {
                  partial[i] = str(i, value) || 'null';
              }

// Join all of the elements together, separated with commas, and wrap them in
// brackets.

              v = partial.length === 0 ? '[]' : gap ?
                  '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
                  '[' + partial.join(',') + ']';
              gap = mind;
              return v;
          }

// If the replacer is an array, use it to select the members to be stringified.

          if (rep && typeof rep === 'object') {
              length = rep.length;
              for (i = 0; i < length; i += 1) {
                  if (typeof rep[i] === 'string') {
                      k = rep[i];
                      v = str(k, value);
                      if (v) {
                          partial.push(quote(k) + (gap ? ': ' : ':') + v);
                      }
                  }
              }
          } else {

// Otherwise, iterate through all of the keys in the object.

              for (k in value) {
                  if (Object.prototype.hasOwnProperty.call(value, k)) {
                      v = str(k, value);
                      if (v) {
                          partial.push(quote(k) + (gap ? ': ' : ':') + v);
                      }
                  }
              }
          }

// Join all of the member texts together, separated with commas,
// and wrap them in braces.

          v = partial.length === 0 ? '{}' : gap ?
              '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
              '{' + partial.join(',') + '}';
          gap = mind;
          return v;
      }
  }

// If the JSON object does not yet have a stringify method, give it one.

  JSON.stringify = function (value, replacer, space) {

// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.

      var i;
      gap = '';
      indent = '';

// If the space parameter is a number, make an indent string containing that
// many spaces.

      if (typeof space === 'number') {
          for (i = 0; i < space; i += 1) {
              indent += ' ';
          }

// If the space parameter is a string, it will be used as the indent string.

      } else if (typeof space === 'string') {
          indent = space;
      }

// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.

      rep = replacer;
      if (replacer && typeof replacer !== 'function' &&
              (typeof replacer !== 'object' ||
              typeof replacer.length !== 'number')) {
          throw new Error('JSON.stringify');
      }

// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.

      return str('', {'': value});
  };

// If the JSON object does not yet have a parse method, give it one.

  JSON.parse = function (text, reviver) {
  // The parse method takes a text and an optional reviver function, and returns
  // a JavaScript value if the text is a valid JSON text.

      var j;

      function walk(holder, key) {

  // The walk method is used to recursively walk the resulting structure so
  // that modifications can be made.

          var k, v, value = holder[key];
          if (value && typeof value === 'object') {
              for (k in value) {
                  if (Object.prototype.hasOwnProperty.call(value, k)) {
                      v = walk(value, k);
                      if (v !== undefined) {
                          value[k] = v;
                      } else {
                          delete value[k];
                      }
                  }
              }
          }
          return reviver.call(holder, key, value);
      }


  // Parsing happens in four stages. In the first stage, we replace certain
  // Unicode characters with escape sequences. JavaScript handles many characters
  // incorrectly, either silently deleting them, or treating them as line endings.

      text = String(text);
      cx.lastIndex = 0;
      if (cx.test(text)) {
          text = text.replace(cx, function (a) {
              return '\\u' +
                  ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
          });
      }

  // In the second stage, we run the text against regular expressions that look
  // for non-JSON patterns. We are especially concerned with '()' and 'new'
  // because they can cause invocation, and '=' because it can cause mutation.
  // But just to be safe, we want to reject all unexpected forms.

  // We split the second stage into 4 regexp operations in order to work around
  // crippling inefficiencies in IE's and Safari's regexp engines. First we
  // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
  // replace all simple value tokens with ']' characters. Third, we delete all
  // open brackets that follow a colon or comma or that begin the text. Finally,
  // we look to see that the remaining characters are only whitespace or ']' or
  // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

      if (/^[\],:{}\s]*$/
              .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
                  .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
                  .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

  // In the third stage we use the eval function to compile the text into a
  // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
  // in JavaScript: it can begin a block or an object literal. We wrap the text
  // in parens to eliminate the ambiguity.

          j = eval('(' + text + ')');

  // In the optional fourth stage, we recursively walk the new structure, passing
  // each name/value pair to a reviver function for possible transformation.

          return typeof reviver === 'function' ?
              walk({'': j}, '') : j;
      }

  // If the text is not JSON parseable, then a SyntaxError is thrown.

      throw new SyntaxError('JSON.parse');
  };

})(
    'undefined' != typeof io ? io : module.exports
  , typeof JSON !== 'undefined' ? JSON : undefined
);

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

  /**
   * Parser namespace.
   *
   * @namespace
   */

  var parser = exports.parser = {};

  /**
   * Packet types.
   */

  var packets = parser.packets = [
      'disconnect'
    , 'connect'
    , 'heartbeat'
    , 'message'
    , 'json'
    , 'event'
    , 'ack'
    , 'error'
    , 'noop'
  ];

  /**
   * Errors reasons.
   */

  var reasons = parser.reasons = [
      'transport not supported'
    , 'client not handshaken'
    , 'unauthorized'
  ];

  /**
   * Errors advice.
   */

  var advice = parser.advice = [
      'reconnect'
  ];

  /**
   * Shortcuts.
   */

  var JSON = io.JSON
    , indexOf = io.util.indexOf;

  /**
   * Encodes a packet.
   *
   * @api private
   */

  parser.encodePacket = function (packet) {
    var type = indexOf(packets, packet.type)
      , id = packet.id || ''
      , endpoint = packet.endpoint || ''
      , ack = packet.ack
      , data = null;

    switch (packet.type) {
      case 'error':
        var reason = packet.reason ? indexOf(reasons, packet.reason) : ''
          , adv = packet.advice ? indexOf(advice, packet.advice) : '';

        if (reason !== '' || adv !== '')
          data = reason + (adv !== '' ? ('+' + adv) : '');

        break;

      case 'message':
        if (packet.data !== '')
          data = packet.data;
        break;

      case 'event':
        var ev = { name: packet.name };

        if (packet.args && packet.args.length) {
          ev.args = packet.args;
        }

        data = JSON.stringify(ev);
        break;

      case 'json':
        data = JSON.stringify(packet.data);
        break;

      case 'connect':
        if (packet.qs)
          data = packet.qs;
        break;

      case 'ack':
        data = packet.ackId
          + (packet.args && packet.args.length
              ? '+' + JSON.stringify(packet.args) : '');
        break;
    }

    // construct packet with required fragments
    var encoded = [
        type
      , id + (ack == 'data' ? '+' : '')
      , endpoint
    ];

    // data fragment is optional
    if (data !== null && data !== undefined)
      encoded.push(data);

    return encoded.join(':');
  };

  /**
   * Encodes multiple messages (payload).
   *
   * @param {Array} messages
   * @api private
   */

  parser.encodePayload = function (packets) {
    var decoded = '';

    if (packets.length == 1)
      return packets[0];

    for (var i = 0, l = packets.length; i < l; i++) {
      var packet = packets[i];
      decoded += '\ufffd' + packet.length + '\ufffd' + packets[i];
    }

    return decoded;
  };

  /**
   * Decodes a packet
   *
   * @api private
   */

  var regexp = /([^:]+):([0-9]+)?(\+)?:([^:]+)?:?([\s\S]*)?/;

  parser.decodePacket = function (data) {
    var pieces = data.match(regexp);

    if (!pieces) return {};

    var id = pieces[2] || ''
      , data = pieces[5] || ''
      , packet = {
            type: packets[pieces[1]]
          , endpoint: pieces[4] || ''
        };

    // whether we need to acknowledge the packet
    if (id) {
      packet.id = id;
      if (pieces[3])
        packet.ack = 'data';
      else
        packet.ack = true;
    }

    // handle different packet types
    switch (packet.type) {
      case 'error':
        var pieces = data.split('+');
        packet.reason = reasons[pieces[0]] || '';
        packet.advice = advice[pieces[1]] || '';
        break;

      case 'message':
        packet.data = data || '';
        break;

      case 'event':
        try {
          var opts = JSON.parse(data);
          packet.name = opts.name;
          packet.args = opts.args;
        } catch (e) { }

        packet.args = packet.args || [];
        break;

      case 'json':
        try {
          packet.data = JSON.parse(data);
        } catch (e) { }
        break;

      case 'connect':
        packet.qs = data || '';
        break;

      case 'ack':
        var pieces = data.match(/^([0-9]+)(\+)?(.*)/);
        if (pieces) {
          packet.ackId = pieces[1];
          packet.args = [];

          if (pieces[3]) {
            try {
              packet.args = pieces[3] ? JSON.parse(pieces[3]) : [];
            } catch (e) { }
          }
        }
        break;

      case 'disconnect':
      case 'heartbeat':
        break;
    };

    return packet;
  };

  /**
   * Decodes data payload. Detects multiple messages
   *
   * @return {Array} messages
   * @api public
   */

  parser.decodePayload = function (data) {
    // IE doesn't like data[i] for unicode chars, charAt works fine
    if (data.charAt(0) == '\ufffd') {
      var ret = [];

      for (var i = 1, length = ''; i < data.length; i++) {
        if (data.charAt(i) == '\ufffd') {
          ret.push(parser.decodePacket(data.substr(i + 1).substr(0, length)));
          i += Number(length) + 1;
          length = '';
        } else {
          length += data.charAt(i);
        }
      }

      return ret;
    } else {
      return [parser.decodePacket(data)];
    }
  };

})(
    'undefined' != typeof io ? io : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

  /**
   * Expose constructor.
   */

  exports.Transport = Transport;

  /**
   * This is the transport template for all supported transport methods.
   *
   * @constructor
   * @api public
   */

  function Transport (socket, sessid) {
    this.socket = socket;
    this.sessid = sessid;
  };

  /**
   * Apply EventEmitter mixin.
   */

  io.util.mixin(Transport, io.EventEmitter);


  /**
   * Indicates whether heartbeats is enabled for this transport
   *
   * @api private
   */

  Transport.prototype.heartbeats = function () {
    return true;
  };

  /**
   * Handles the response from the server. When a new response is received
   * it will automatically update the timeout, decode the message and
   * forwards the response to the onMessage function for further processing.
   *
   * @param {String} data Response from the server.
   * @api private
   */

  Transport.prototype.onData = function (data) {
    this.clearCloseTimeout();

    // If the connection in currently open (or in a reopening state) reset the close
    // timeout since we have just received data. This check is necessary so
    // that we don't reset the timeout on an explicitly disconnected connection.
    if (this.socket.connected || this.socket.connecting || this.socket.reconnecting) {
      this.setCloseTimeout();
    }

    if (data !== '') {
      // todo: we should only do decodePayload for xhr transports
      var msgs = io.parser.decodePayload(data);

      if (msgs && msgs.length) {
        for (var i = 0, l = msgs.length; i < l; i++) {
          this.onPacket(msgs[i]);
        }
      }
    }

    return this;
  };

  /**
   * Handles packets.
   *
   * @api private
   */

  Transport.prototype.onPacket = function (packet) {
    this.socket.setHeartbeatTimeout();

    if (packet.type == 'heartbeat') {
      return this.onHeartbeat();
    }

    if (packet.type == 'connect' && packet.endpoint == '') {
      this.onConnect();
    }

    if (packet.type == 'error' && packet.advice == 'reconnect') {
      this.isOpen = false;
    }

    this.socket.onPacket(packet);

    return this;
  };

  /**
   * Sets close timeout
   *
   * @api private
   */

  Transport.prototype.setCloseTimeout = function () {
    if (!this.closeTimeout) {
      var self = this;

      this.closeTimeout = setTimeout(function () {
        self.onDisconnect();
      }, this.socket.closeTimeout);
    }
  };

  /**
   * Called when transport disconnects.
   *
   * @api private
   */

  Transport.prototype.onDisconnect = function () {
    if (this.isOpen) this.close();
    this.clearTimeouts();
    this.socket.onDisconnect();
    return this;
  };

  /**
   * Called when transport connects
   *
   * @api private
   */

  Transport.prototype.onConnect = function () {
    this.socket.onConnect();
    return this;
  };

  /**
   * Clears close timeout
   *
   * @api private
   */

  Transport.prototype.clearCloseTimeout = function () {
    if (this.closeTimeout) {
      clearTimeout(this.closeTimeout);
      this.closeTimeout = null;
    }
  };

  /**
   * Clear timeouts
   *
   * @api private
   */

  Transport.prototype.clearTimeouts = function () {
    this.clearCloseTimeout();

    if (this.reopenTimeout) {
      clearTimeout(this.reopenTimeout);
    }
  };

  /**
   * Sends a packet
   *
   * @param {Object} packet object.
   * @api private
   */

  Transport.prototype.packet = function (packet) {
    this.send(io.parser.encodePacket(packet));
  };

  /**
   * Send the received heartbeat message back to server. So the server
   * knows we are still connected.
   *
   * @param {String} heartbeat Heartbeat response from the server.
   * @api private
   */

  Transport.prototype.onHeartbeat = function (heartbeat) {
    this.packet({ type: 'heartbeat' });
  };

  /**
   * Called when the transport opens.
   *
   * @api private
   */

  Transport.prototype.onOpen = function () {
    this.isOpen = true;
    this.clearCloseTimeout();
    this.socket.onOpen();
  };

  /**
   * Notifies the base when the connection with the Socket.IO server
   * has been disconnected.
   *
   * @api private
   */

  Transport.prototype.onClose = function () {
    var self = this;

    /* FIXME: reopen delay causing a infinit loop
    this.reopenTimeout = setTimeout(function () {
      self.open();
    }, this.socket.options['reopen delay']);*/

    this.isOpen = false;
    this.socket.onClose();
    this.onDisconnect();
  };

  /**
   * Generates a connection url based on the Socket.IO URL Protocol.
   * See <https://github.com/learnboost/socket.io-node/> for more details.
   *
   * @returns {String} Connection url
   * @api private
   */

  Transport.prototype.prepareUrl = function () {
    var options = this.socket.options;

    return this.scheme() + '://'
      + options.host + ':' + options.port + '/'
      + options.resource + '/' + io.protocol
      + '/' + this.name + '/' + this.sessid;
  };

  /**
   * Checks if the transport is ready to start a connection.
   *
   * @param {Socket} socket The socket instance that needs a transport
   * @param {Function} fn The callback
   * @api private
   */

  Transport.prototype.ready = function (socket, fn) {
    fn.call(this);
  };
})(
    'undefined' != typeof io ? io : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {

  /**
   * Expose constructor.
   */

  exports.Socket = Socket;

  /**
   * Create a new `Socket.IO client` which can establish a persistent
   * connection with a Socket.IO enabled server.
   *
   * @api public
   */

  function Socket (options) {
    this.options = {
        port: 80
      , secure: false
      , document: 'document' in global ? document : false
      , resource: 'socket.io'
      , transports: io.transports
      , 'connect timeout': 10000
      , 'try multiple transports': true
      , 'reconnect': true
      , 'reconnection delay': 500
      , 'reconnection limit': Infinity
      , 'reopen delay': 3000
      , 'max reconnection attempts': 10
      , 'sync disconnect on unload': false
      , 'auto connect': true
      , 'flash policy port': 10843
      , 'manualFlush': false
    };

    io.util.merge(this.options, options);

    this.connected = false;
    this.open = false;
    this.connecting = false;
    this.reconnecting = false;
    this.namespaces = {};
    this.buffer = [];
    this.doBuffer = false;

    if (this.options['sync disconnect on unload'] &&
        (!this.isXDomain() || io.util.ua.hasCORS)) {
      var self = this;
      io.util.on(global, 'beforeunload', function () {
        self.disconnectSync();
      }, false);
    }

    if (this.options['auto connect']) {
      this.connect();
    }
};

  /**
   * Apply EventEmitter mixin.
   */

  io.util.mixin(Socket, io.EventEmitter);

  /**
   * Returns a namespace listener/emitter for this socket
   *
   * @api public
   */

  Socket.prototype.of = function (name) {
    if (!this.namespaces[name]) {
      this.namespaces[name] = new io.SocketNamespace(this, name);

      if (name !== '') {
        this.namespaces[name].packet({ type: 'connect' });
      }
    }

    return this.namespaces[name];
  };

  /**
   * Emits the given event to the Socket and all namespaces
   *
   * @api private
   */

  Socket.prototype.publish = function () {
    this.emit.apply(this, arguments);

    var nsp;

    for (var i in this.namespaces) {
      if (this.namespaces.hasOwnProperty(i)) {
        nsp = this.of(i);
        nsp.$emit.apply(nsp, arguments);
      }
    }
  };

  /**
   * Performs the handshake
   *
   * @api private
   */

  function empty () { };

  Socket.prototype.handshake = function (fn) {
    var self = this
      , options = this.options;

    function complete (data) {
      if (data instanceof Error) {
        self.connecting = false;
        self.onError(data.message);
      } else {
        fn.apply(null, data.split(':'));
      }
    };

    var url = [
          'http' + (options.secure ? 's' : '') + ':/'
        , options.host + ':' + options.port
        , options.resource
        , io.protocol
        , io.util.query(this.options.query, 't=' + +new Date)
      ].join('/');

    if (this.isXDomain() && !io.util.ua.hasCORS) {
      var insertAt = document.getElementsByTagName('script')[0]
        , script = document.createElement('script');

      script.src = url + '&jsonp=' + io.j.length;
      insertAt.parentNode.insertBefore(script, insertAt);

      io.j.push(function (data) {
        complete(data);
        script.parentNode.removeChild(script);
      });
    } else {
      var xhr = io.util.request();

      xhr.open('GET', url, true);
      if (this.isXDomain()) {
        xhr.withCredentials = true;
      }
      xhr.onreadystatechange = function () {
        if (xhr.readyState == 4) {
          xhr.onreadystatechange = empty;

          if (xhr.status == 200) {
            complete(xhr.responseText);
          } else if (xhr.status == 403) {
            self.onError(xhr.responseText);
          } else {
            self.connecting = false;            
            !self.reconnecting && self.onError(xhr.responseText);
          }
        }
      };
      xhr.send(null);
    }
  };

  /**
   * Find an available transport based on the options supplied in the constructor.
   *
   * @api private
   */

  Socket.prototype.getTransport = function (override) {
    var transports = override || this.transports, match;

    for (var i = 0, transport; transport = transports[i]; i++) {
      if (io.Transport[transport]
        && io.Transport[transport].check(this)
        && (!this.isXDomain() || io.Transport[transport].xdomainCheck(this))) {
        return new io.Transport[transport](this, this.sessionid);
      }
    }

    return null;
  };

  /**
   * Connects to the server.
   *
   * @param {Function} [fn] Callback.
   * @returns {io.Socket}
   * @api public
   */

  Socket.prototype.connect = function (fn) {
    if (this.connecting) {
      return this;
    }

    var self = this;
    self.connecting = true;
    
    this.handshake(function (sid, heartbeat, close, transports) {
      self.sessionid = sid;
      self.closeTimeout = close * 1000;
      self.heartbeatTimeout = heartbeat * 1000;
      if(!self.transports)
          self.transports = self.origTransports = (transports ? io.util.intersect(
              transports.split(',')
            , self.options.transports
          ) : self.options.transports);

      self.setHeartbeatTimeout();

      function connect (transports){
        if (self.transport) self.transport.clearTimeouts();

        self.transport = self.getTransport(transports);
        if (!self.transport) return self.publish('connect_failed');

        // once the transport is ready
        self.transport.ready(self, function () {
          self.connecting = true;
          self.publish('connecting', self.transport.name);
          self.transport.open();

          if (self.options['connect timeout']) {
            self.connectTimeoutTimer = setTimeout(function () {
              if (!self.connected) {
                self.connecting = false;

                if (self.options['try multiple transports']) {
                  var remaining = self.transports;

                  while (remaining.length > 0 && remaining.splice(0,1)[0] !=
                         self.transport.name) {}

                    if (remaining.length){
                      connect(remaining);
                    } else {
                      self.publish('connect_failed');
                    }
                }
              }
            }, self.options['connect timeout']);
          }
        });
      }

      connect(self.transports);

      self.once('connect', function (){
        clearTimeout(self.connectTimeoutTimer);

        fn && typeof fn == 'function' && fn();
      });
    });

    return this;
  };

  /**
   * Clears and sets a new heartbeat timeout using the value given by the
   * server during the handshake.
   *
   * @api private
   */

  Socket.prototype.setHeartbeatTimeout = function () {
    clearTimeout(this.heartbeatTimeoutTimer);
    if(this.transport && !this.transport.heartbeats()) return;

    var self = this;
    this.heartbeatTimeoutTimer = setTimeout(function () {
      self.transport.onClose();
    }, this.heartbeatTimeout);
  };

  /**
   * Sends a message.
   *
   * @param {Object} data packet.
   * @returns {io.Socket}
   * @api public
   */

  Socket.prototype.packet = function (data) {
    if (this.connected && !this.doBuffer) {
      this.transport.packet(data);
    } else {
      this.buffer.push(data);
    }

    return this;
  };

  /**
   * Sets buffer state
   *
   * @api private
   */

  Socket.prototype.setBuffer = function (v) {
    this.doBuffer = v;

    if (!v && this.connected && this.buffer.length) {
      if (!this.options['manualFlush']) {
        this.flushBuffer();
      }
    }
  };

  /**
   * Flushes the buffer data over the wire.
   * To be invoked manually when 'manualFlush' is set to true.
   *
   * @api public
   */

  Socket.prototype.flushBuffer = function() {
    this.transport.payload(this.buffer);
    this.buffer = [];
  };
  

  /**
   * Disconnect the established connect.
   *
   * @returns {io.Socket}
   * @api public
   */

  Socket.prototype.disconnect = function () {
    if (this.connected || this.connecting) {
      if (this.open) {
        this.of('').packet({ type: 'disconnect' });
      }

      // handle disconnection immediately
      this.onDisconnect('booted');
    }

    return this;
  };

  /**
   * Disconnects the socket with a sync XHR.
   *
   * @api private
   */

  Socket.prototype.disconnectSync = function () {
    // ensure disconnection
    var xhr = io.util.request();
    var uri = [
        'http' + (this.options.secure ? 's' : '') + ':/'
      , this.options.host + ':' + this.options.port
      , this.options.resource
      , io.protocol
      , ''
      , this.sessionid
    ].join('/') + '/?disconnect=1';

    xhr.open('GET', uri, false);
    xhr.send(null);

    // handle disconnection immediately
    this.onDisconnect('booted');
  };

  /**
   * Check if we need to use cross domain enabled transports. Cross domain would
   * be a different port or different domain name.
   *
   * @returns {Boolean}
   * @api private
   */

  Socket.prototype.isXDomain = function () {

    var port = global.location.port ||
      ('https:' == global.location.protocol ? 443 : 80);

    return this.options.host !== global.location.hostname 
      || this.options.port != port;
  };

  /**
   * Called upon handshake.
   *
   * @api private
   */

  Socket.prototype.onConnect = function () {
    if (!this.connected) {
      this.connected = true;
      this.connecting = false;
      if (!this.doBuffer) {
        // make sure to flush the buffer
        this.setBuffer(false);
      }
      this.emit('connect');
    }
  };

  /**
   * Called when the transport opens
   *
   * @api private
   */

  Socket.prototype.onOpen = function () {
    this.open = true;
  };

  /**
   * Called when the transport closes.
   *
   * @api private
   */

  Socket.prototype.onClose = function () {
    this.open = false;
    clearTimeout(this.heartbeatTimeoutTimer);
  };

  /**
   * Called when the transport first opens a connection
   *
   * @param text
   */

  Socket.prototype.onPacket = function (packet) {
    this.of(packet.endpoint).onPacket(packet);
  };

  /**
   * Handles an error.
   *
   * @api private
   */

  Socket.prototype.onError = function (err) {
    if (err && err.advice) {
      if (err.advice === 'reconnect' && (this.connected || this.connecting)) {
        this.disconnect();
        if (this.options.reconnect) {
          this.reconnect();
        }
      }
    }

    this.publish('error', err && err.reason ? err.reason : err);
  };

  /**
   * Called when the transport disconnects.
   *
   * @api private
   */

  Socket.prototype.onDisconnect = function (reason) {
    var wasConnected = this.connected
      , wasConnecting = this.connecting;

    this.connected = false;
    this.connecting = false;
    this.open = false;

    if (wasConnected || wasConnecting) {
      this.transport.close();
      this.transport.clearTimeouts();
      if (wasConnected) {
        this.publish('disconnect', reason);

        if ('booted' != reason && this.options.reconnect && !this.reconnecting) {
          this.reconnect();
        }
      }
    }
  };

  /**
   * Called upon reconnection.
   *
   * @api private
   */

  Socket.prototype.reconnect = function () {
    this.reconnecting = true;
    this.reconnectionAttempts = 0;
    this.reconnectionDelay = this.options['reconnection delay'];

    var self = this
      , maxAttempts = this.options['max reconnection attempts']
      , tryMultiple = this.options['try multiple transports']
      , limit = this.options['reconnection limit'];

    function reset () {
      if (self.connected) {
        for (var i in self.namespaces) {
          if (self.namespaces.hasOwnProperty(i) && '' !== i) {
              self.namespaces[i].packet({ type: 'connect' });
          }
        }
        self.publish('reconnect', self.transport.name, self.reconnectionAttempts);
      }

      clearTimeout(self.reconnectionTimer);

      self.removeListener('connect_failed', maybeReconnect);
      self.removeListener('connect', maybeReconnect);

      self.reconnecting = false;

      delete self.reconnectionAttempts;
      delete self.reconnectionDelay;
      delete self.reconnectionTimer;
      delete self.redoTransports;

      self.options['try multiple transports'] = tryMultiple;
    };

    function maybeReconnect () {
      if (!self.reconnecting) {
        return;
      }

      if (self.connected) {
        return reset();
      };

      if (self.connecting && self.reconnecting) {
        return self.reconnectionTimer = setTimeout(maybeReconnect, 1000);
      }

      if (self.reconnectionAttempts++ >= maxAttempts) {
        if (!self.redoTransports) {
          self.on('connect_failed', maybeReconnect);
          self.options['try multiple transports'] = true;
          self.transports = self.origTransports;
          self.transport = self.getTransport();
          self.redoTransports = true;
          self.connect();
        } else {
          self.publish('reconnect_failed');
          reset();
        }
      } else {
        if (self.reconnectionDelay < limit) {
          self.reconnectionDelay *= 2; // exponential back off
        }

        self.connect();
        self.publish('reconnecting', self.reconnectionDelay, self.reconnectionAttempts);
        self.reconnectionTimer = setTimeout(maybeReconnect, self.reconnectionDelay);
      }
    };

    this.options['try multiple transports'] = false;
    this.reconnectionTimer = setTimeout(maybeReconnect, this.reconnectionDelay);

    this.on('connect', maybeReconnect);
  };

})(
    'undefined' != typeof io ? io : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
  , this
);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

  /**
   * Expose constructor.
   */

  exports.SocketNamespace = SocketNamespace;

  /**
   * Socket namespace constructor.
   *
   * @constructor
   * @api public
   */

  function SocketNamespace (socket, name) {
    this.socket = socket;
    this.name = name || '';
    this.flags = {};
    this.json = new Flag(this, 'json');
    this.ackPackets = 0;
    this.acks = {};
  };

  /**
   * Apply EventEmitter mixin.
   */

  io.util.mixin(SocketNamespace, io.EventEmitter);

  /**
   * Copies emit since we override it
   *
   * @api private
   */

  SocketNamespace.prototype.$emit = io.EventEmitter.prototype.emit;

  /**
   * Creates a new namespace, by proxying the request to the socket. This
   * allows us to use the synax as we do on the server.
   *
   * @api public
   */

  SocketNamespace.prototype.of = function () {
    return this.socket.of.apply(this.socket, arguments);
  };

  /**
   * Sends a packet.
   *
   * @api private
   */

  SocketNamespace.prototype.packet = function (packet) {
    packet.endpoint = this.name;
    this.socket.packet(packet);
    this.flags = {};
    return this;
  };

  /**
   * Sends a message
   *
   * @api public
   */

  SocketNamespace.prototype.send = function (data, fn) {
    var packet = {
        type: this.flags.json ? 'json' : 'message'
      , data: data
    };

    if ('function' == typeof fn) {
      packet.id = ++this.ackPackets;
      packet.ack = true;
      this.acks[packet.id] = fn;
    }

    return this.packet(packet);
  };

  /**
   * Emits an event
   *
   * @api public
   */
  
  SocketNamespace.prototype.emit = function (name) {
    var args = Array.prototype.slice.call(arguments, 1)
      , lastArg = args[args.length - 1]
      , packet = {
            type: 'event'
          , name: name
        };

    if ('function' == typeof lastArg) {
      packet.id = ++this.ackPackets;
      packet.ack = 'data';
      this.acks[packet.id] = lastArg;
      args = args.slice(0, args.length - 1);
    }

    packet.args = args;

    return this.packet(packet);
  };

  /**
   * Disconnects the namespace
   *
   * @api private
   */

  SocketNamespace.prototype.disconnect = function () {
    if (this.name === '') {
      this.socket.disconnect();
    } else {
      this.packet({ type: 'disconnect' });
      this.$emit('disconnect');
    }

    return this;
  };

  /**
   * Handles a packet
   *
   * @api private
   */

  SocketNamespace.prototype.onPacket = function (packet) {
    var self = this;

    function ack () {
      self.packet({
          type: 'ack'
        , args: io.util.toArray(arguments)
        , ackId: packet.id
      });
    };

    switch (packet.type) {
      case 'connect':
        this.$emit('connect');
        break;

      case 'disconnect':
        if (this.name === '') {
          this.socket.onDisconnect(packet.reason || 'booted');
        } else {
          this.$emit('disconnect', packet.reason);
        }
        break;

      case 'message':
      case 'json':
        var params = ['message', packet.data];

        if (packet.ack == 'data') {
          params.push(ack);
        } else if (packet.ack) {
          this.packet({ type: 'ack', ackId: packet.id });
        }

        this.$emit.apply(this, params);
        break;

      case 'event':
        var params = [packet.name].concat(packet.args);

        if (packet.ack == 'data')
          params.push(ack);

        this.$emit.apply(this, params);
        break;

      case 'ack':
        if (this.acks[packet.ackId]) {
          this.acks[packet.ackId].apply(this, packet.args);
          delete this.acks[packet.ackId];
        }
        break;

      case 'error':
        if (packet.advice){
          this.socket.onError(packet);
        } else {
          if (packet.reason == 'unauthorized') {
            this.$emit('connect_failed', packet.reason);
          } else {
            this.$emit('error', packet.reason);
          }
        }
        break;
    }
  };

  /**
   * Flag interface.
   *
   * @api private
   */

  function Flag (nsp, name) {
    this.namespace = nsp;
    this.name = name;
  };

  /**
   * Send a message
   *
   * @api public
   */

  Flag.prototype.send = function () {
    this.namespace.flags[this.name] = true;
    this.namespace.send.apply(this.namespace, arguments);
  };

  /**
   * Emit an event
   *
   * @api public
   */

  Flag.prototype.emit = function () {
    this.namespace.flags[this.name] = true;
    this.namespace.emit.apply(this.namespace, arguments);
  };

})(
    'undefined' != typeof io ? io : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
);

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {

  /**
   * Expose constructor.
   */

  exports.websocket = WS;

  /**
   * The WebSocket transport uses the HTML5 WebSocket API to establish an
   * persistent connection with the Socket.IO server. This transport will also
   * be inherited by the FlashSocket fallback as it provides a API compatible
   * polyfill for the WebSockets.
   *
   * @constructor
   * @extends {io.Transport}
   * @api public
   */

  function WS (socket) {
    io.Transport.apply(this, arguments);
  };

  /**
   * Inherits from Transport.
   */

  io.util.inherit(WS, io.Transport);

  /**
   * Transport name
   *
   * @api public
   */

  WS.prototype.name = 'websocket';

  /**
   * Initializes a new `WebSocket` connection with the Socket.IO server. We attach
   * all the appropriate listeners to handle the responses from the server.
   *
   * @returns {Transport}
   * @api public
   */

  WS.prototype.open = function () {
    var query = io.util.query(this.socket.options.query)
      , self = this
      , Socket


    if (!Socket) {
      Socket = global.MozWebSocket || global.WebSocket;
    }

    this.websocket = new Socket(this.prepareUrl() + query);

    this.websocket.onopen = function () {
      self.onOpen();
      self.socket.setBuffer(false);
    };
    this.websocket.onmessage = function (ev) {
      self.onData(ev.data);
    };
    this.websocket.onclose = function () {
      self.onClose();
      self.socket.setBuffer(true);
    };
    this.websocket.onerror = function (e) {
      self.onError(e);
    };

    return this;
  };

  /**
   * Send a message to the Socket.IO server. The message will automatically be
   * encoded in the correct message format.
   *
   * @returns {Transport}
   * @api public
   */

  // Do to a bug in the current IDevices browser, we need to wrap the send in a 
  // setTimeout, when they resume from sleeping the browser will crash if 
  // we don't allow the browser time to detect the socket has been closed
  if (io.util.ua.iDevice) {
    WS.prototype.send = function (data) {
      var self = this;
      setTimeout(function() {
         self.websocket.send(data);
      },0);
      return this;
    };
  } else {
    WS.prototype.send = function (data) {
      this.websocket.send(data);
      return this;
    };
  }

  /**
   * Payload
   *
   * @api private
   */

  WS.prototype.payload = function (arr) {
    for (var i = 0, l = arr.length; i < l; i++) {
      this.packet(arr[i]);
    }
    return this;
  };

  /**
   * Disconnect the established `WebSocket` connection.
   *
   * @returns {Transport}
   * @api public
   */

  WS.prototype.close = function () {
    this.websocket.close();
    return this;
  };

  /**
   * Handle the errors that `WebSocket` might be giving when we
   * are attempting to connect or send messages.
   *
   * @param {Error} e The error.
   * @api private
   */

  WS.prototype.onError = function (e) {
    this.socket.onError(e);
  };

  /**
   * Returns the appropriate scheme for the URI generation.
   *
   * @api private
   */
  WS.prototype.scheme = function () {
    return this.socket.options.secure ? 'wss' : 'ws';
  };

  /**
   * Checks if the browser has support for native `WebSockets` and that
   * it's not the polyfill created for the FlashSocket transport.
   *
   * @return {Boolean}
   * @api public
   */

  WS.check = function () {
    return ('WebSocket' in global && !('__addTask' in WebSocket))
          || 'MozWebSocket' in global;
  };

  /**
   * Check if the `WebSocket` transport support cross domain communications.
   *
   * @returns {Boolean}
   * @api public
   */

  WS.xdomainCheck = function () {
    return true;
  };

  /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

  io.transports.push('websocket');

})(
    'undefined' != typeof io ? io.Transport : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
  , this
);

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

  /**
   * Expose constructor.
   */

  exports.flashsocket = Flashsocket;

  /**
   * The FlashSocket transport. This is a API wrapper for the HTML5 WebSocket
   * specification. It uses a .swf file to communicate with the server. If you want
   * to serve the .swf file from a other server than where the Socket.IO script is
   * coming from you need to use the insecure version of the .swf. More information
   * about this can be found on the github page.
   *
   * @constructor
   * @extends {io.Transport.websocket}
   * @api public
   */

  function Flashsocket () {
    io.Transport.websocket.apply(this, arguments);
  };

  /**
   * Inherits from Transport.
   */

  io.util.inherit(Flashsocket, io.Transport.websocket);

  /**
   * Transport name
   *
   * @api public
   */

  Flashsocket.prototype.name = 'flashsocket';

  /**
   * Disconnect the established `FlashSocket` connection. This is done by adding a 
   * new task to the FlashSocket. The rest will be handled off by the `WebSocket` 
   * transport.
   *
   * @returns {Transport}
   * @api public
   */

  Flashsocket.prototype.open = function () {
    var self = this
      , args = arguments;

    WebSocket.__addTask(function () {
      io.Transport.websocket.prototype.open.apply(self, args);
    });
    return this;
  };
  
  /**
   * Sends a message to the Socket.IO server. This is done by adding a new
   * task to the FlashSocket. The rest will be handled off by the `WebSocket` 
   * transport.
   *
   * @returns {Transport}
   * @api public
   */

  Flashsocket.prototype.send = function () {
    var self = this, args = arguments;
    WebSocket.__addTask(function () {
      io.Transport.websocket.prototype.send.apply(self, args);
    });
    return this;
  };

  /**
   * Disconnects the established `FlashSocket` connection.
   *
   * @returns {Transport}
   * @api public
   */

  Flashsocket.prototype.close = function () {
    WebSocket.__tasks.length = 0;
    io.Transport.websocket.prototype.close.call(this);
    return this;
  };

  /**
   * The WebSocket fall back needs to append the flash container to the body
   * element, so we need to make sure we have access to it. Or defer the call
   * until we are sure there is a body element.
   *
   * @param {Socket} socket The socket instance that needs a transport
   * @param {Function} fn The callback
   * @api private
   */

  Flashsocket.prototype.ready = function (socket, fn) {
    function init () {
      var options = socket.options
        , port = options['flash policy port']
        , path = [
              'http' + (options.secure ? 's' : '') + ':/'
            , options.host + ':' + options.port
            , options.resource
            , 'static/flashsocket'
            , 'WebSocketMain' + (socket.isXDomain() ? 'Insecure' : '') + '.swf'
          ];

      // Only start downloading the swf file when the checked that this browser
      // actually supports it
      if (!Flashsocket.loaded) {
        if (typeof WEB_SOCKET_SWF_LOCATION === 'undefined') {
          // Set the correct file based on the XDomain settings
          WEB_SOCKET_SWF_LOCATION = path.join('/');
        }

        if (port !== 843) {
          WebSocket.loadFlashPolicyFile('xmlsocket://' + options.host + ':' + port);
        }

        WebSocket.__initialize();
        Flashsocket.loaded = true;
      }

      fn.call(self);
    }

    var self = this;
    if (document.body) return init();

    io.util.load(init);
  };

  /**
   * Check if the FlashSocket transport is supported as it requires that the Adobe
   * Flash Player plug-in version `10.0.0` or greater is installed. And also check if
   * the polyfill is correctly loaded.
   *
   * @returns {Boolean}
   * @api public
   */

  Flashsocket.check = function () {
    if (
        typeof WebSocket == 'undefined'
      || !('__initialize' in WebSocket) || !swfobject
    ) return false;

    return swfobject.getFlashPlayerVersion().major >= 10;
  };

  /**
   * Check if the FlashSocket transport can be used as cross domain / cross origin 
   * transport. Because we can't see which type (secure or insecure) of .swf is used
   * we will just return true.
   *
   * @returns {Boolean}
   * @api public
   */

  Flashsocket.xdomainCheck = function () {
    return true;
  };

  /**
   * Disable AUTO_INITIALIZATION
   */

  if (typeof window != 'undefined') {
    WEB_SOCKET_DISABLE_AUTO_INITIALIZATION = true;
  }

  /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

  io.transports.push('flashsocket');
})(
    'undefined' != typeof io ? io.Transport : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
);
/*	SWFObject v2.2 <http://code.google.com/p/swfobject/> 
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*/
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an=u(aj,am,ah);if(aj.id==ah){w(ah,true)}X.success=true;X.ref=an}else{if(aa&&A()){aj.data=aa;P(aj,am,ah,ac);return}else{w(ah,true)}}if(ac){ac(X)}})}else{if(ac){ac(X)}}},switchOffAutoHideShow:function(){m=false},ua:M,getFlashPlayerVersion:function(){return{major:M.pv[0],minor:M.pv[1],release:M.pv[2]}},hasFlashPlayerVersion:F,createSWF:function(Z,Y,X){if(M.w3){return u(Z,Y,X)}else{return undefined}},showExpressInstall:function(Z,aa,X,Y){if(M.w3&&A()){P(Z,aa,X,Y)}},removeSWF:function(X){if(M.w3){y(X)}},createCSS:function(aa,Z,Y,X){if(M.w3){v(aa,Z,Y,X)}},addDomLoadEvent:K,addLoadEvent:s,getQueryParamValue:function(aa){var Z=j.location.search||j.location.hash;if(Z){if(/\?/.test(Z)){Z=Z.split("?")[1]}if(aa==null){return L(Z)}var Y=Z.split("&");for(var X=0;X<Y.length;X++){if(Y[X].substring(0,Y[X].indexOf("="))==aa){return L(Y[X].substring((Y[X].indexOf("=")+1)))}}}return""},expressInstallCallback:function(){if(a){var 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}
// Copyright: Hiroshi Ichikawa <http://gimite.net/en/>
// License: New BSD License
// Reference: http://dev.w3.org/html5/websockets/
// Reference: http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol

(function() {
  
  if ('undefined' == typeof window || window.WebSocket) return;

  var console = window.console;
  if (!console || !console.log || !console.error) {
    console = {log: function(){ }, error: function(){ }};
  }
  
  if (!swfobject.hasFlashPlayerVersion("10.0.0")) {
    console.error("Flash Player >= 10.0.0 is required.");
    return;
  }
  if (location.protocol == "file:") {
    console.error(
      "WARNING: web-socket-js doesn't work in file:///... URL " +
      "unless you set Flash Security Settings properly. " +
      "Open the page via Web server i.e. http://...");
  }

  /**
   * This class represents a faux web socket.
   * @param {string} url
   * @param {array or string} protocols
   * @param {string} proxyHost
   * @param {int} proxyPort
   * @param {string} headers
   */
  WebSocket = function(url, protocols, proxyHost, proxyPort, headers) {
    var self = this;
    self.__id = WebSocket.__nextId++;
    WebSocket.__instances[self.__id] = self;
    self.readyState = WebSocket.CONNECTING;
    self.bufferedAmount = 0;
    self.__events = {};
    if (!protocols) {
      protocols = [];
    } else if (typeof protocols == "string") {
      protocols = [protocols];
    }
    // Uses setTimeout() to make sure __createFlash() runs after the caller sets ws.onopen etc.
    // Otherwise, when onopen fires immediately, onopen is called before it is set.
    setTimeout(function() {
      WebSocket.__addTask(function() {
        WebSocket.__flash.create(
            self.__id, url, protocols, proxyHost || null, proxyPort || 0, headers || null);
      });
    }, 0);
  };

  /**
   * Send data to the web socket.
   * @param {string} data  The data to send to the socket.
   * @return {boolean}  True for success, false for failure.
   */
  WebSocket.prototype.send = function(data) {
    if (this.readyState == WebSocket.CONNECTING) {
      throw "INVALID_STATE_ERR: Web Socket connection has not been established";
    }
    // We use encodeURIComponent() here, because FABridge doesn't work if
    // the argument includes some characters. We don't use escape() here
    // because of this:
    // https://developer.mozilla.org/en/Core_JavaScript_1.5_Guide/Functions#escape_and_unescape_Functions
    // But it looks decodeURIComponent(encodeURIComponent(s)) doesn't
    // preserve all Unicode characters either e.g. "\uffff" in Firefox.
    // Note by wtritch: Hopefully this will not be necessary using ExternalInterface.  Will require
    // additional testing.
    var result = WebSocket.__flash.send(this.__id, encodeURIComponent(data));
    if (result < 0) { // success
      return true;
    } else {
      this.bufferedAmount += result;
      return false;
    }
  };

  /**
   * Close this web socket gracefully.
   */
  WebSocket.prototype.close = function() {
    if (this.readyState == WebSocket.CLOSED || this.readyState == WebSocket.CLOSING) {
      return;
    }
    this.readyState = WebSocket.CLOSING;
    WebSocket.__flash.close(this.__id);
  };

  /**
   * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
   *
   * @param {string} type
   * @param {function} listener
   * @param {boolean} useCapture
   * @return void
   */
  WebSocket.prototype.addEventListener = function(type, listener, useCapture) {
    if (!(type in this.__events)) {
      this.__events[type] = [];
    }
    this.__events[type].push(listener);
  };

  /**
   * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
   *
   * @param {string} type
   * @param {function} listener
   * @param {boolean} useCapture
   * @return void
   */
  WebSocket.prototype.removeEventListener = function(type, listener, useCapture) {
    if (!(type in this.__events)) return;
    var events = this.__events[type];
    for (var i = events.length - 1; i >= 0; --i) {
      if (events[i] === listener) {
        events.splice(i, 1);
        break;
      }
    }
  };

  /**
   * Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
   *
   * @param {Event} event
   * @return void
   */
  WebSocket.prototype.dispatchEvent = function(event) {
    var events = this.__events[event.type] || [];
    for (var i = 0; i < events.length; ++i) {
      events[i](event);
    }
    var handler = this["on" + event.type];
    if (handler) handler(event);
  };

  /**
   * Handles an event from Flash.
   * @param {Object} flashEvent
   */
  WebSocket.prototype.__handleEvent = function(flashEvent) {
    if ("readyState" in flashEvent) {
      this.readyState = flashEvent.readyState;
    }
    if ("protocol" in flashEvent) {
      this.protocol = flashEvent.protocol;
    }
    
    var jsEvent;
    if (flashEvent.type == "open" || flashEvent.type == "error") {
      jsEvent = this.__createSimpleEvent(flashEvent.type);
    } else if (flashEvent.type == "close") {
      // TODO implement jsEvent.wasClean
      jsEvent = this.__createSimpleEvent("close");
    } else if (flashEvent.type == "message") {
      var data = decodeURIComponent(flashEvent.message);
      jsEvent = this.__createMessageEvent("message", data);
    } else {
      throw "unknown event type: " + flashEvent.type;
    }
    
    this.dispatchEvent(jsEvent);
  };
  
  WebSocket.prototype.__createSimpleEvent = function(type) {
    if (document.createEvent && window.Event) {
      var event = document.createEvent("Event");
      event.initEvent(type, false, false);
      return event;
    } else {
      return {type: type, bubbles: false, cancelable: false};
    }
  };
  
  WebSocket.prototype.__createMessageEvent = function(type, data) {
    if (document.createEvent && window.MessageEvent && !window.opera) {
      var event = document.createEvent("MessageEvent");
      event.initMessageEvent("message", false, false, data, null, null, window, null);
      return event;
    } else {
      // IE and Opera, the latter one truncates the data parameter after any 0x00 bytes.
      return {type: type, data: data, bubbles: false, cancelable: false};
    }
  };
  
  /**
   * Define the WebSocket readyState enumeration.
   */
  WebSocket.CONNECTING = 0;
  WebSocket.OPEN = 1;
  WebSocket.CLOSING = 2;
  WebSocket.CLOSED = 3;

  WebSocket.__flash = null;
  WebSocket.__instances = {};
  WebSocket.__tasks = [];
  WebSocket.__nextId = 0;
  
  /**
   * Load a new flash security policy file.
   * @param {string} url
   */
  WebSocket.loadFlashPolicyFile = function(url){
    WebSocket.__addTask(function() {
      WebSocket.__flash.loadManualPolicyFile(url);
    });
  };

  /**
   * Loads WebSocketMain.swf and creates WebSocketMain object in Flash.
   */
  WebSocket.__initialize = function() {
    if (WebSocket.__flash) return;
    
    if (WebSocket.__swfLocation) {
      // For backword compatibility.
      window.WEB_SOCKET_SWF_LOCATION = WebSocket.__swfLocation;
    }
    if (!window.WEB_SOCKET_SWF_LOCATION) {
      console.error("[WebSocket] set WEB_SOCKET_SWF_LOCATION to location of WebSocketMain.swf");
      return;
    }
    var container = document.createElement("div");
    container.id = "webSocketContainer";
    // Hides Flash box. We cannot use display: none or visibility: hidden because it prevents
    // Flash from loading at least in IE. So we move it out of the screen at (-100, -100).
    // But this even doesn't work with Flash Lite (e.g. in Droid Incredible). So with Flash
    // Lite, we put it at (0, 0). This shows 1x1 box visible at left-top corner but this is
    // the best we can do as far as we know now.
    container.style.position = "absolute";
    if (WebSocket.__isFlashLite()) {
      container.style.left = "0px";
      container.style.top = "0px";
    } else {
      container.style.left = "-100px";
      container.style.top = "-100px";
    }
    var holder = document.createElement("div");
    holder.id = "webSocketFlash";
    container.appendChild(holder);
    document.body.appendChild(container);
    // See this article for hasPriority:
    // http://help.adobe.com/en_US/as3/mobile/WS4bebcd66a74275c36cfb8137124318eebc6-7ffd.html
    swfobject.embedSWF(
      WEB_SOCKET_SWF_LOCATION,
      "webSocketFlash",
      "1" /* width */,
      "1" /* height */,
      "10.0.0" /* SWF version */,
      null,
      null,
      {hasPriority: true, swliveconnect : true, allowScriptAccess: "always"},
      null,
      function(e) {
        if (!e.success) {
          console.error("[WebSocket] swfobject.embedSWF failed");
        }
      });
  };
  
  /**
   * Called by Flash to notify JS that it's fully loaded and ready
   * for communication.
   */
  WebSocket.__onFlashInitialized = function() {
    // We need to set a timeout here to avoid round-trip calls
    // to flash during the initialization process.
    setTimeout(function() {
      WebSocket.__flash = document.getElementById("webSocketFlash");
      WebSocket.__flash.setCallerUrl(location.href);
      WebSocket.__flash.setDebug(!!window.WEB_SOCKET_DEBUG);
      for (var i = 0; i < WebSocket.__tasks.length; ++i) {
        WebSocket.__tasks[i]();
      }
      WebSocket.__tasks = [];
    }, 0);
  };
  
  /**
   * Called by Flash to notify WebSockets events are fired.
   */
  WebSocket.__onFlashEvent = function() {
    setTimeout(function() {
      try {
        // Gets events using receiveEvents() instead of getting it from event object
        // of Flash event. This is to make sure to keep message order.
        // It seems sometimes Flash events don't arrive in the same order as they are sent.
        var events = WebSocket.__flash.receiveEvents();
        for (var i = 0; i < events.length; ++i) {
          WebSocket.__instances[events[i].webSocketId].__handleEvent(events[i]);
        }
      } catch (e) {
        console.error(e);
      }
    }, 0);
    return true;
  };
  
  // Called by Flash.
  WebSocket.__log = function(message) {
    console.log(decodeURIComponent(message));
  };
  
  // Called by Flash.
  WebSocket.__error = function(message) {
    console.error(decodeURIComponent(message));
  };
  
  WebSocket.__addTask = function(task) {
    if (WebSocket.__flash) {
      task();
    } else {
      WebSocket.__tasks.push(task);
    }
  };
  
  /**
   * Test if the browser is running flash lite.
   * @return {boolean} True if flash lite is running, false otherwise.
   */
  WebSocket.__isFlashLite = function() {
    if (!window.navigator || !window.navigator.mimeTypes) {
      return false;
    }
    var mimeType = window.navigator.mimeTypes["application/x-shockwave-flash"];
    if (!mimeType || !mimeType.enabledPlugin || !mimeType.enabledPlugin.filename) {
      return false;
    }
    return mimeType.enabledPlugin.filename.match(/flashlite/i) ? true : false;
  };
  
  if (!window.WEB_SOCKET_DISABLE_AUTO_INITIALIZATION) {
    if (window.addEventListener) {
      window.addEventListener("load", function(){
        WebSocket.__initialize();
      }, false);
    } else {
      window.attachEvent("onload", function(){
        WebSocket.__initialize();
      });
    }
  }
  
})();

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {

  /**
   * Expose constructor.
   *
   * @api public
   */

  exports.XHR = XHR;

  /**
   * XHR constructor
   *
   * @costructor
   * @api public
   */

  function XHR (socket) {
    if (!socket) return;

    io.Transport.apply(this, arguments);
    this.sendBuffer = [];
  };

  /**
   * Inherits from Transport.
   */

  io.util.inherit(XHR, io.Transport);

  /**
   * Establish a connection
   *
   * @returns {Transport}
   * @api public
   */

  XHR.prototype.open = function () {
    this.socket.setBuffer(false);
    this.onOpen();
    this.get();

    // we need to make sure the request succeeds since we have no indication
    // whether the request opened or not until it succeeded.
    this.setCloseTimeout();

    return this;
  };

  /**
   * Check if we need to send data to the Socket.IO server, if we have data in our
   * buffer we encode it and forward it to the `post` method.
   *
   * @api private
   */

  XHR.prototype.payload = function (payload) {
    var msgs = [];

    for (var i = 0, l = payload.length; i < l; i++) {
      msgs.push(io.parser.encodePacket(payload[i]));
    }

    this.send(io.parser.encodePayload(msgs));
  };

  /**
   * Send data to the Socket.IO server.
   *
   * @param data The message
   * @returns {Transport}
   * @api public
   */

  XHR.prototype.send = function (data) {
    this.post(data);
    return this;
  };

  /**
   * Posts a encoded message to the Socket.IO server.
   *
   * @param {String} data A encoded message.
   * @api private
   */

  function empty () { };

  XHR.prototype.post = function (data) {
    var self = this;
    this.socket.setBuffer(true);

    function stateChange () {
      if (this.readyState == 4) {
        this.onreadystatechange = empty;
        self.posting = false;

        if (this.status == 200){
          self.socket.setBuffer(false);
        } else {
          self.onClose();
        }
      }
    }

    function onload () {
      this.onload = empty;
      self.socket.setBuffer(false);
    };

    this.sendXHR = this.request('POST');

    if (global.XDomainRequest && this.sendXHR instanceof XDomainRequest) {
      this.sendXHR.onload = this.sendXHR.onerror = onload;
    } else {
      this.sendXHR.onreadystatechange = stateChange;
    }

    this.sendXHR.send(data);
  };

  /**
   * Disconnects the established `XHR` connection.
   *
   * @returns {Transport}
   * @api public
   */

  XHR.prototype.close = function () {
    this.onClose();
    return this;
  };

  /**
   * Generates a configured XHR request
   *
   * @param {String} url The url that needs to be requested.
   * @param {String} method The method the request should use.
   * @returns {XMLHttpRequest}
   * @api private
   */

  XHR.prototype.request = function (method) {
    var req = io.util.request(this.socket.isXDomain())
      , query = io.util.query(this.socket.options.query, 't=' + +new Date);

    req.open(method || 'GET', this.prepareUrl() + query, true);

    if (method == 'POST') {
      try {
        if (req.setRequestHeader) {
          req.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
        } else {
          // XDomainRequest
          req.contentType = 'text/plain';
        }
      } catch (e) {}
    }

    return req;
  };

  /**
   * Returns the scheme to use for the transport URLs.
   *
   * @api private
   */

  XHR.prototype.scheme = function () {
    return this.socket.options.secure ? 'https' : 'http';
  };

  /**
   * Check if the XHR transports are supported
   *
   * @param {Boolean} xdomain Check if we support cross domain requests.
   * @returns {Boolean}
   * @api public
   */

  XHR.check = function (socket, xdomain) {
    try {
      var request = io.util.request(xdomain),
          usesXDomReq = (global.XDomainRequest && request instanceof XDomainRequest),
          socketProtocol = (socket && socket.options && socket.options.secure ? 'https:' : 'http:'),
          isXProtocol = (global.location && socketProtocol != global.location.protocol);
      if (request && !(usesXDomReq && isXProtocol)) {
        return true;
      }
    } catch(e) {}

    return false;
  };

  /**
   * Check if the XHR transport supports cross domain requests.
   *
   * @returns {Boolean}
   * @api public
   */

  XHR.xdomainCheck = function (socket) {
    return XHR.check(socket, true);
  };

})(
    'undefined' != typeof io ? io.Transport : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
  , this
);
/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io) {

  /**
   * Expose constructor.
   */

  exports.htmlfile = HTMLFile;

  /**
   * The HTMLFile transport creates a `forever iframe` based transport
   * for Internet Explorer. Regular forever iframe implementations will 
   * continuously trigger the browsers buzy indicators. If the forever iframe
   * is created inside a `htmlfile` these indicators will not be trigged.
   *
   * @constructor
   * @extends {io.Transport.XHR}
   * @api public
   */

  function HTMLFile (socket) {
    io.Transport.XHR.apply(this, arguments);
  };

  /**
   * Inherits from XHR transport.
   */

  io.util.inherit(HTMLFile, io.Transport.XHR);

  /**
   * Transport name
   *
   * @api public
   */

  HTMLFile.prototype.name = 'htmlfile';

  /**
   * Creates a new Ac...eX `htmlfile` with a forever loading iframe
   * that can be used to listen to messages. Inside the generated
   * `htmlfile` a reference will be made to the HTMLFile transport.
   *
   * @api private
   */

  HTMLFile.prototype.get = function () {
    this.doc = new window[(['Active'].concat('Object').join('X'))]('htmlfile');
    this.doc.open();
    this.doc.write('<html></html>');
    this.doc.close();
    this.doc.parentWindow.s = this;

    var iframeC = this.doc.createElement('div');
    iframeC.className = 'socketio';

    this.doc.body.appendChild(iframeC);
    this.iframe = this.doc.createElement('iframe');

    iframeC.appendChild(this.iframe);

    var self = this
      , query = io.util.query(this.socket.options.query, 't='+ +new Date);

    this.iframe.src = this.prepareUrl() + query;

    io.util.on(window, 'unload', function () {
      self.destroy();
    });
  };

  /**
   * The Socket.IO server will write script tags inside the forever
   * iframe, this function will be used as callback for the incoming
   * information.
   *
   * @param {String} data The message
   * @param {document} doc Reference to the context
   * @api private
   */

  HTMLFile.prototype._ = function (data, doc) {
    // unescape all forward slashes. see GH-1251
    data = data.replace(/\\\//g, '/');
    this.onData(data);
    try {
      var script = doc.getElementsByTagName('script')[0];
      script.parentNode.removeChild(script);
    } catch (e) { }
  };

  /**
   * Destroy the established connection, iframe and `htmlfile`.
   * And calls the `CollectGarbage` function of Internet Explorer
   * to release the memory.
   *
   * @api private
   */

  HTMLFile.prototype.destroy = function () {
    if (this.iframe){
      try {
        this.iframe.src = 'about:blank';
      } catch(e){}

      this.doc = null;
      this.iframe.parentNode.removeChild(this.iframe);
      this.iframe = null;

      CollectGarbage();
    }
  };

  /**
   * Disconnects the established connection.
   *
   * @returns {Transport} Chaining.
   * @api public
   */

  HTMLFile.prototype.close = function () {
    this.destroy();
    return io.Transport.XHR.prototype.close.call(this);
  };

  /**
   * Checks if the browser supports this transport. The browser
   * must have an `Ac...eXObject` implementation.
   *
   * @return {Boolean}
   * @api public
   */

  HTMLFile.check = function (socket) {
    if (typeof window != "undefined" && (['Active'].concat('Object').join('X')) in window){
      try {
        var a = new window[(['Active'].concat('Object').join('X'))]('htmlfile');
        return a && io.Transport.XHR.check(socket);
      } catch(e){}
    }
    return false;
  };

  /**
   * Check if cross domain requests are supported.
   *
   * @returns {Boolean}
   * @api public
   */

  HTMLFile.xdomainCheck = function () {
    // we can probably do handling for sub-domains, we should
    // test that it's cross domain but a subdomain here
    return false;
  };

  /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

  io.transports.push('htmlfile');

})(
    'undefined' != typeof io ? io.Transport : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
);

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {

  /**
   * Expose constructor.
   */

  exports['xhr-polling'] = XHRPolling;

  /**
   * The XHR-polling transport uses long polling XHR requests to create a
   * "persistent" connection with the server.
   *
   * @constructor
   * @api public
   */

  function XHRPolling () {
    io.Transport.XHR.apply(this, arguments);
  };

  /**
   * Inherits from XHR transport.
   */

  io.util.inherit(XHRPolling, io.Transport.XHR);

  /**
   * Merge the properties from XHR transport
   */

  io.util.merge(XHRPolling, io.Transport.XHR);

  /**
   * Transport name
   *
   * @api public
   */

  XHRPolling.prototype.name = 'xhr-polling';

  /**
   * Indicates whether heartbeats is enabled for this transport
   *
   * @api private
   */

  XHRPolling.prototype.heartbeats = function () {
    return false;
  };

  /** 
   * Establish a connection, for iPhone and Android this will be done once the page
   * is loaded.
   *
   * @returns {Transport} Chaining.
   * @api public
   */

  XHRPolling.prototype.open = function () {
    var self = this;

    io.Transport.XHR.prototype.open.call(self);
    return false;
  };

  /**
   * Starts a XHR request to wait for incoming messages.
   *
   * @api private
   */

  function empty () {};

  XHRPolling.prototype.get = function () {
    if (!this.isOpen) return;

    var self = this;

    function stateChange () {
      if (this.readyState == 4) {
        this.onreadystatechange = empty;

        if (this.status == 200) {
          self.onData(this.responseText);
          self.get();
        } else {
          self.onClose();
        }
      }
    };

    function onload () {
      this.onload = empty;
      this.onerror = empty;
      self.retryCounter = 1;
      self.onData(this.responseText);
      self.get();
    };

    function onerror () {
      self.retryCounter ++;
      if(!self.retryCounter || self.retryCounter > 3) {
        self.onClose();  
      } else {
        self.get();
      }
    };

    this.xhr = this.request();

    if (global.XDomainRequest && this.xhr instanceof XDomainRequest) {
      this.xhr.onload = onload;
      this.xhr.onerror = onerror;
    } else {
      this.xhr.onreadystatechange = stateChange;
    }

    this.xhr.send(null);
  };

  /**
   * Handle the unclean close behavior.
   *
   * @api private
   */

  XHRPolling.prototype.onClose = function () {
    io.Transport.XHR.prototype.onClose.call(this);

    if (this.xhr) {
      this.xhr.onreadystatechange = this.xhr.onload = this.xhr.onerror = empty;
      try {
        this.xhr.abort();
      } catch(e){}
      this.xhr = null;
    }
  };

  /**
   * Webkit based browsers show a infinit spinner when you start a XHR request
   * before the browsers onload event is called so we need to defer opening of
   * the transport until the onload event is called. Wrapping the cb in our
   * defer method solve this.
   *
   * @param {Socket} socket The socket instance that needs a transport
   * @param {Function} fn The callback
   * @api private
   */

  XHRPolling.prototype.ready = function (socket, fn) {
    var self = this;

    io.util.defer(function () {
      fn.call(self);
    });
  };

  /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

  io.transports.push('xhr-polling');

})(
    'undefined' != typeof io ? io.Transport : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
  , this
);

/**
 * socket.io
 * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
 * MIT Licensed
 */

(function (exports, io, global) {
  /**
   * There is a way to hide the loading indicator in Firefox. If you create and
   * remove a iframe it will stop showing the current loading indicator.
   * Unfortunately we can't feature detect that and UA sniffing is evil.
   *
   * @api private
   */

  var indicator = global.document && "MozAppearance" in
    global.document.documentElement.style;

  /**
   * Expose constructor.
   */

  exports['jsonp-polling'] = JSONPPolling;

  /**
   * The JSONP transport creates an persistent connection by dynamically
   * inserting a script tag in the page. This script tag will receive the
   * information of the Socket.IO server. When new information is received
   * it creates a new script tag for the new data stream.
   *
   * @constructor
   * @extends {io.Transport.xhr-polling}
   * @api public
   */

  function JSONPPolling (socket) {
    io.Transport['xhr-polling'].apply(this, arguments);

    this.index = io.j.length;

    var self = this;

    io.j.push(function (msg) {
      self._(msg);
    });
  };

  /**
   * Inherits from XHR polling transport.
   */

  io.util.inherit(JSONPPolling, io.Transport['xhr-polling']);

  /**
   * Transport name
   *
   * @api public
   */

  JSONPPolling.prototype.name = 'jsonp-polling';

  /**
   * Posts a encoded message to the Socket.IO server using an iframe.
   * The iframe is used because script tags can create POST based requests.
   * The iframe is positioned outside of the view so the user does not
   * notice it's existence.
   *
   * @param {String} data A encoded message.
   * @api private
   */

  JSONPPolling.prototype.post = function (data) {
    var self = this
      , query = io.util.query(
             this.socket.options.query
          , 't='+ (+new Date) + '&i=' + this.index
        );

    if (!this.form) {
      var form = document.createElement('form')
        , area = document.createElement('textarea')
        , id = this.iframeId = 'socketio_iframe_' + this.index
        , iframe;

      form.className = 'socketio';
      form.style.position = 'absolute';
      form.style.top = '0px';
      form.style.left = '0px';
      form.style.display = 'none';
      form.target = id;
      form.method = 'POST';
      form.setAttribute('accept-charset', 'utf-8');
      area.name = 'd';
      form.appendChild(area);
      document.body.appendChild(form);

      this.form = form;
      this.area = area;
    }

    this.form.action = this.prepareUrl() + query;

    function complete () {
      initIframe();
      self.socket.setBuffer(false);
    };

    function initIframe () {
      if (self.iframe) {
        self.form.removeChild(self.iframe);
      }

      try {
        // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
        iframe = document.createElement('<iframe name="'+ self.iframeId +'">');
      } catch (e) {
        iframe = document.createElement('iframe');
        iframe.name = self.iframeId;
      }

      iframe.id = self.iframeId;

      self.form.appendChild(iframe);
      self.iframe = iframe;
    };

    initIframe();

    // we temporarily stringify until we figure out how to prevent
    // browsers from turning `\n` into `\r\n` in form inputs
    this.area.value = io.JSON.stringify(data);

    try {
      this.form.submit();
    } catch(e) {}

    if (this.iframe.attachEvent) {
      iframe.onreadystatechange = function () {
        if (self.iframe.readyState == 'complete') {
          complete();
        }
      };
    } else {
      this.iframe.onload = complete;
    }

    this.socket.setBuffer(true);
  };

  /**
   * Creates a new JSONP poll that can be used to listen
   * for messages from the Socket.IO server.
   *
   * @api private
   */

  JSONPPolling.prototype.get = function () {
    var self = this
      , script = document.createElement('script')
      , query = io.util.query(
             this.socket.options.query
          , 't='+ (+new Date) + '&i=' + this.index
        );

    if (this.script) {
      this.script.parentNode.removeChild(this.script);
      this.script = null;
    }

    script.async = true;
    script.src = this.prepareUrl() + query;
    script.onerror = function () {
      self.onClose();
    };

    var insertAt = document.getElementsByTagName('script')[0];
    insertAt.parentNode.insertBefore(script, insertAt);
    this.script = script;

    if (indicator) {
      setTimeout(function () {
        var iframe = document.createElement('iframe');
        document.body.appendChild(iframe);
        document.body.removeChild(iframe);
      }, 100);
    }
  };

  /**
   * Callback function for the incoming message stream from the Socket.IO server.
   *
   * @param {String} data The message
   * @api private
   */

  JSONPPolling.prototype._ = function (msg) {
    this.onData(msg);
    if (this.isOpen) {
      this.get();
    }
    return this;
  };

  /**
   * The indicator hack only works after onload
   *
   * @param {Socket} socket The socket instance that needs a transport
   * @param {Function} fn The callback
   * @api private
   */

  JSONPPolling.prototype.ready = function (socket, fn) {
    var self = this;
    if (!indicator) return fn.call(this);

    io.util.load(function () {
      fn.call(self);
    });
  };

  /**
   * Checks if browser supports this transport.
   *
   * @return {Boolean}
   * @api public
   */

  JSONPPolling.check = function () {
    return 'document' in global;
  };

  /**
   * Check if cross domain requests are supported
   *
   * @returns {Boolean}
   * @api public
   */

  JSONPPolling.xdomainCheck = function () {
    return true;
  };

  /**
   * Add the transport to your public io.transports array.
   *
   * @api private
   */

  io.transports.push('jsonp-polling');

})(
    'undefined' != typeof io ? io.Transport : module.exports
  , 'undefined' != typeof io ? io : module.parent.exports
  , this
);

if (typeof define === "function" && define.amd) {
  define([], function () { return io; });
}
})();
},{}]},{},[])