все работает
<html>
<head>
<meta charset='utf-8' />
<title></title>
<script type='text/javascript'>
</script>
</head><body>
<div id='el'> dfasdfasdf
</div>
<script type='text/javascript'>
var elem=document.getElementById('el');
function fn(a){alert(a);}
elem.addEventListener('click', function(){
fn('txt');
}, false);
</script>
</body>
</html>