startList = function() 
{
  if (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;