Denne her fungerer (altså ifht. den jeg postede første :)):
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "
http://www.w3.org/TR/html4/loose.dtd"><html>
<head>
<title>test menu</title>
<script type="text/javascript">
var selectedMenu;
function selectMenu(obj) {
if(selectedMenu) selectedMenu.style.fontWeight = 'normal';
obj.style.fontWeight = 'bold';
selectedMenu = obj;
}
window.onload = function() {
var objMenu = document.getElementById("menu");
if(objMenu) {
var links = objMenu.getElementsByTagName("A");
for(var i = 0; i < links.length; i++) {
links[i].onclick = function() {selectMenu(this);}
}
}
}
</script>
</head>
<body>
<ul id="menu">
<li><a href="side1.htm" target="ifmNav">Side 1</a></li>
<li><a href="side2.htm" target="ifmNav">Side 2</a></li>
<li><a href="side3.htm" target="ifmNav">Side 3</a></li>
<li><a href="side4.htm" target="ifmNav">Side 4</a></li>
</ul>
<iframe name="ifmNav"></iframe>
</body>
</html>