<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<a href="foo">foo</a>
<a href="bar">bar</a>
<a href="baz">baz</a>
<button onclick="show()">show</button>
<script>
chng=function(){
window.last=this.href; return false
}
show=function(){
alert(last)
}
links=document.getElementsByTagName("a")
for(i in links) {if(!/\d+/.test(i)) break; links[i].onclick=chng}
</script>
</body>
</html>