function SwitchMenu(obj){
	if(document.getElementById){
	var el = document.getElementById(obj);
	var ar = document.getElementById("cont").getElementsByTagName("div");
		if(el.style.display == "none"){
			for (var i=0; i<ar.length; i++){
				ar[i].style.display = "none";
			}
			el.style.display = "block";
		}else{
			el.style.display = "none";
		}
	}
}
function ChangeClass(menu, newClass) 
	{
	 if (document.getElementById) 
		{
	 	document.getElementById(menu).className = newClass;
	 	}
	}
	document.onselectstart = new Function("return false");