gistfile1.txt

this.e = function(e,cb){
    var that=this,resolvedCb=function(event){cb.call(that,event)};
    if(window.addEventListener){ // ALL
        this.bj.addEventListener(e,resolvedCb,false);
    }
    else if(window.attachEvent){ // IE
        this.bj.attachEvent(e,resolvedCb);
    }
    return this;
};