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