function SwitchMenu(obj, objtype) {
	if (document.getElementById) {
		var el = document.getElementById(obj);
		var ar = document.getElementById("masterdiv").getElementsByTagName("span");
		if (el.style.display != "block") {
			for (var i=0; i<ar.length; i++) {
				if ( ar[i].className == objtype + "menu" ) {
					ar[i].style.display = "none";
				}
			}
			el.style.display = "block";
			
		} else {
			el.style.display = "none";
		}
	}
}