diff --git a/core/js/core.js b/core/js/core.js
index 71482433cc..02896262ee 100644
--- a/core/js/core.js
+++ b/core/js/core.js
@@ -31,7 +31,7 @@ function getTemplate(_folder, _version, _filename, _replace) {
     success: function(data) {
       if (isset(_replace) && _replace != null) {
         var reg = null;
-        for (i in _replace) {
+        for (var i in _replace) {
           reg = new RegExp(i, "g");
           data = data.replace(reg, _replace[i]);
         }
diff --git a/core/js/private.class.js b/core/js/private.class.js
index 2276e73ded..edaf93c55b 100644
--- a/core/js/private.class.js
+++ b/core/js/private.class.js
@@ -274,7 +274,6 @@ jeedom.private.checkAndGetParams = function(_params, _paramsSpecifics, _paramsRe
   var params = domUtils.extend({}, jeedom.private.default_params, _paramsSpecifics, _params || {});
 
   //Convert all objects in params to json
-  var param = null;
   for (var attr in params) {
     params[attr] = (typeof params[attr] == 'object') ? JSON.stringify(params[attr]) : params[attr];
   }
diff --git a/core/js/view.class.js b/core/js/view.class.js
index 67501f4f14..be5de68e66 100644
--- a/core/js/view.class.js
+++ b/core/js/view.class.js
@@ -48,7 +48,7 @@ jeedom.view.toHtml = function(_params) {
   var paramsRequired = ['id', 'version'];
   var paramsSpecifics = {
     pre_success: function(data) {
-      result = jeedom.view.handleViewAjax({
+      var result = jeedom.view.handleViewAjax({
         view: data.result
       });
       result.raw = data.result;
@@ -135,7 +135,7 @@ jeedom.view.handleViewAjax = function(_params) {
       for (var j in viewZone.viewData) {
         viewData = viewZone.viewData[j];
         configuration = JSON.stringify(viewData.configuration);
-        option = configuration.replace(/"/g, "'");
+        var option = configuration.replace(/"/g, "'");
         result.html += '<div class="viewZoneData hidden" data-cmdId="'+viewData.link_id+'" data-option="'+option+'" data-el="'+div_id+'" data-height="'+viewZone.configuration.height+'" data-dateRange="'+viewZone.configuration.dateRange+'"></div>';
       }
       result.html += '</div>';