//gracias a Dr.Yes.
function OnloadLibrary(){
    var t = this;
    t.docLoaded = false;
    t.event = [];
    t.addEvent = function(str){
        t.event[t.event.length] = str;
        return t.event.length;
    }
    t.loadEvents = function(){
        for(var i=0; i<t.event.length;i++) {
            eval(t.event[i]);
        }
        t.docLoaded = true;
    }
    window.onload = t.loadEvents;
}
var onloadLib = new OnloadLibrary();