navPop = function() 
{
	if (document.all && document.getElementById("navigation").currentStyle)
	{  
		var navRoot = document.getElementById("navigation");
	   var lis=navRoot.getElementsByTagName("LI");
		for (i=0; i<lis.length; i++)
		{
	   	if(lis[i].lastChild.tagName=="UL")
			{
	      	lis[i].onmouseover=function()
				{	
			      this.lastChild.style.display="block";
	   	   }
	      	lis[i].onmouseout=function()
				{
	           	this.lastChild.style.display="none";
	         }
			}
		}
	}
}
window.onload=navPop;