function showLogin(bShow) {
	
		var login = document.getElementById("login");
	
		if (navigator.appVersion.match(/\bMSIE\b/)) {
			var height = "";
			var overflow = "";
			if(bShow) {
				height = "100%";
				overflow = "hidden";
			}
				
			var body = document.getElementsByTagName('body')[0];
			body.style.height = height;
			body.style.overflow = overflow;
	  
			var html = document.getElementsByTagName('html')[0];
			html.style.height = height;
			html.style.overflow = overflow;
			
			login.style.position = "absolute";
		} else {
			login.style.position = "fixed";
		}
		
		login.style.display = bShow ? "block":"none";
	}