function showList(id) {
	document.getElementById('list1').style.display = 'none';
	document.getElementById('list2').style.display = 'none';
	document.getElementById('list3').style.display = 'none';
	document.getElementById('list4').style.display = 'none';
	document.getElementById('list'+id).style.display = 'block'; 
}



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);