function SwitchMenu(obj,v){
	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 (v=="B") { ar[i].style.display = "none";}
			}
			el.style.display = "block";
		}else{
			el.style.display = "none";
		}
	}
}