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);


/* 
Global "swap" holder 
Use value, null, if no layer initially visible 
*/ 
var currLayerId = "text0"; 

function togLayer(id) 
{ 
if(currLayerId) setDisplay(currLayerId, "none"); 
if(id)setDisplay(id, "block"); 
currLayerId = id; 
} 

function setDisplay(id,value) 
{ 
var elm = document.getElementById(id); 
elm.style.display = value; 
}