sfHover = function() {

	var sfEls = document.getElementById("nav").getElementsByTagName("LI"); 
	
	for (var i=0; i<sfEls.length; i++) { 
	
			sfEls[i].onmouseover=function() { 
			
				this.className+=" sfhover"; 
			 	
			} 
			
			sfEls[i].onmouseout=function() { 
			
				this.className=this.className.replace(new RegExp(" sfhover\\b"), ""); 
				
			} 
					
	} 
	
} 

if (window.attachEvent) window.attachEvent("onload", sfHover);

function keepTop(theElementName,imageName) {
	
	var es = document.getElementById(theElementName);
	var bg = 'url("/whs/images/' + imageName + '")';
	es.style.background = bg;
}

function changeBack(theElementName,imageName) {
	
	var es = document.getElementById(theElementName);
	var bg = 'url("/whs/images/' + imageName + '")';
	es.style.background = bg;
}