Код:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>Untitled</title>
<style type="text/css">
.js DIV{display:none;}
</style>
<script type="text/javascript">
function switchTo(id){
var el = document.getElementById(id.slice((id.indexOf('#')+1)));
//alert(id.slice((id.indexOf('#')+1)))
if(el){
current.style.display = "none";
current = el;
current.style.display = "block";
}
return false;
}
</script>
</head>
<body>
<script type="text/javascript">
document.body.className+=" js";
</script>
<a href="#l1" onclick="return switchTo(this.href);">1</a>
<a href="#l2" onclick="return switchTo(this.href);">2</a>
<a href="#l3" onclick="return switchTo(this.href);">3</a>
<div id="l1">первый, на!</div>
<div id="l2">вророй, иниибё!</div>
<div id="l3">в тройке, ёпрст!</div>
<script type="text/javascript">
var divs = ["l1", "l2", "l3"];
var current = document.getElementById(divs[0]);
current.style.display = "block";
</script>
</body>
</html>