function SwitchMenu(obj,bullet){
	if(document.getElementById){
		var el = document.getElementById(obj);
		var im = document.getElementById(bullet);
		var ar = document.getElementById("usernav").getElementsByTagName("span");
		var ims = document.getElementById("usernav").getElementsByTagName("img");
		if(el.style.display != "block"){
		for (var i=0; i<ar.length; i++){
			if (ar[i].className=="submenu")
				ar[i].style.display = "none";
			}
			el.style.display = "block";
			for (var i=0; i<ims.length; i++){
				if (ims[i] != im)
				ims[i].src = "images/go-down.gif";
				else
				ims[i].src = "images/go-up.gif";
			}
		}
		else{
			el.style.display = "none";
			im.src = "images/go-down.gif";
		}
	}
}