<!DOCTYPE HTML>
<html>
<head> </head>
<body>
<a href="#">click me </a>
<script>
var elem = document.body.children[0];
elem.onclick = onElementClick;
var first_call = false;
function onElementClick () {
if(!first_call){
first();
first_call = true;
return;
}
alert("second");
return false;
}
function first() {
alert("first");
}
</script>
</body>
</html>