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if (window.addEventListener) {
      window.addEventListener("load",setupEvents,false);
...
   } else {
      window.onload=setupEvents;
}

function setupEvents(evnt) {
   document.forms[1].onsubmit=myAlert;
...
function myAlert() {
        alert("gackerriffic");
}

    var isIE = /*@cc_on!@*/false; // is the browser Internet Explorer 
+?
    var addEvent = !isIE
...
       });
     });

  myNode.onevent = function() {
     // your code
     if (myNode.onevent) myNode.onevent.call(myNode,arguments);
  };