gistfile1.js

YUI.add('example',function(Y){
    
    
    var Example= function(){
        Example.superclass.constructor.apply(this,arguments);
    };
    
    Y.extend(Example, Y.Overlay,{
        /* proto */
    },{
        NAME : 'example',
        ATTRS : {
            type : {
                setter: function (val) {
                    this.get('boundingBox').replaceClass(
                        this.getClassName("type", this.get('type') || "default"),
                        this.getClassName("type", val || "default"));

                    return val;
                }
            }
        }
    });
    
    Y.Example = Example;
    
},'0.1',{requires:['overlay']});