Add tooltip in each step

Hello, I'm trying to add a tooltip text in each step but I haven't found a way. 

This is my code:

``` javascript
//tooltip_state is a dict like {'state_name':'description'}
for (i in tooltip_state) {
    if (states[counter] == i){
        $('tspan').attr({title: i});
    }
 }
```

Is it possible to make this?
