function $(id)
		{
			return document.getElementById(id);
		}
		function login_show() {
			$('auth').style.display = "block";
			$('authdialog').style.left = '50%';
			$('loginfocusneeded').focus();
		}
		function login_hide() {
			$('authdialog').style.position = 'absolute';
			$('authdialog').style.left = '-2000px';
			$('auth').style.display = "none";
		}
		document.onkeypress = function(ev){
			ev = ev || event;
			if(ev.keyCode==27)
				login_hide();
		}
		function ieheight() {
			var bg = $('body').offsetHeight;
			$('bg').style.height = bg + 'px';
		}
		window.onload = ieheight;