I have an addEvent function:

function addEvent(elem, event, func ) {
   if (typeof (window.event) != 'undefined')
        elem.attachEvent('on' + event, func);
   else 
       elem.addEventListener(event, func, false);
}

<a href="#" id="link">link</a>

and I'm trying to add the following to window.onload:

addEvent(window, 'load', function (){
   // add another event
   var link= document.getElementById('link');
   addEvent(link, 'click', function () {alert('Hi'); });
});

My question is: why does the link event not work?