function IEHoverPseudo() 
{

	var navItems = document.getElementById("topmenu").getElementsByTagName("li");
	
	for (var i=0; i<navItems.length; i++) 
	{
		if(navItems[i].className == "sub") 
		{
			navItems[i].onmouseover=function() { this.className += " over"; }
			navItems[i].onmouseout=function() { this.className = "sub"; }
		}
	}

}
window.onload = IEHoverPseudo;