var isActive = ""
var started = false;
function showSub(which) {
	if (document.getElementById) {
		if (isActive!="") {
			document.getElementById(isActive).style.visibility="hidden";
			document.getElementById("navigation").style.height = "20px";
		}
		if (which!="") {	
			document.getElementById(which).style.visibility="visible";
			document.getElementById("navigation").style.height = "200px";
		}
		
	}
	else {
		if (isActive!="") document.all.which.style.visibility="hidden";
		if (which!="") document.all.which.style.visibility="visible";
	}
	isActive = which;
	if (which=="") MM_swapImgRestore();
	
}