Applies event listeners to elements by selectors when the document is ready.
The event name is specified with an `@` suffix.

Ext.addBehaviors({
// add a listener for click on all anchors in element with id foo
'#foo a@click' : function(e, t){
// do something
},

// add the same listener to multiple selectors (separated by comma BEFORE the @)
'#foo a, #bar span.some-class@mouseover' : function(){
// do something
}
});

@param {Object} obj The list of behaviors to apply
function(o){
            if(!Ext.isReady){
                Ext.onReady(function(){
                    Ext.addBehaviors(o);
                });
            } else {
                var cache = {}, // simple cache for applying multiple behaviors to same selector does query multiple times
                    parts,
                    b,
                    s;
                for (b in o) {
                    if ((parts = b.split('@'))[1]) { // for Object prototype breakers
                        s = parts[0];
                        if(!cache[s]){
                            cache[s] = Ext.select(s);
                        }
                        cache[s].on(parts[1], o[b]);
                    }
                }
                cache = null;
            }
        }