// JavaScript Document
sfHover = function() {
	var sfEls = document.getElementById("main_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 reveal (image) {
		document.getElementById("default").style.display = "none"
		document.getElementById(image).style.display = ""
}
	
	function hide (image) {
		document.getElementById(image).style.display = "none"
				document.getElementById("default").style.display = ""
	}