// nav menu
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);



// Show & Hide
function show(c) {
	if (document.getElementById && document.getElementById(c)!= null) 
		node = document.getElementById(c).style.display='block'; 
	else if (document.layers && document.layers[c]!= null) 
		document.layers[c].display = 'block'; 
	else if (document.all && document.all(c)!= null) 
		document.all[c].style.display = 'block';
} 

function hide(c) {	
	if (document.getElementById && document.getElementById(c)!= null)
		node = document.getElementById(c).style.display='none';
	else if (document.layers && document.layers[c]!= null) 
		document.layers[c].display = 'none';
	else if (document.all && document.all(c)!= null) 
		document.all[c].style.display = 'none';
}