// manipulates the className property of the ul element so i.e can do the layer thing
startList = function() 
{
	if (document.all&&document.getElementById) 
	{
		navRoot = document.getElementById("nav");
		for (i=0; i<navRoot.childNodes.length; i++) 
		{
		node = navRoot.childNodes[i];
			if (node.nodeName=="LI") 
			{
				node.onmouseover=function() 
				{
					this.className+=" over";
						}
						node.onmouseout=function() 
				{
							this.className=this.className.replace(" over", "");
 						}
 					}
				}
		}
}
window.onload=startList;