add event

function hazCosasMaravillosasConElDOM() {}
 
    //addEvent() by John Resig
    function addEvent( obj, type, fn ){ 
        if (obj.addEventListener){ 
            obj.addEventListener( type, fn, false );
        }
        else if (obj.attachEvent){ 
            obj["e"+type+fn] = fn; 
            obj[type+fn] = function(){ obj["e"+type+fn]( window.event ); } 
            obj.attachEvent( "on"+type, obj[type+fn] ); 
        } 
    } 
 
    addEvent(window, 'load', hazCosasMaravillosasConElDOM);