Dojo behaviour

 Css class is "hideTitle" assign it to any dom element or any dojo element . And manipulate the code
 Even if you have 1000 div elements it will register the event

var myBehavior = {
    ".hideTitle" : {
        onclick: onPurchaseClick,
        onMouseOver: function(evt){
            event.target.title="";
        }
    }
};

dojo.behavior.add(myBehavior);
dojo.behavior.apply();