function popup(datei) {
			  var b = 800;
			  var h = 640;
			  var x = screen.width/2 - b/2;
			  var y = screen.height/2 - h/2;
			  fenster = window.open(datei, "popup", "width="+b+", height="+h+", left="+x+", top="+y+", scrollbars=no, resizable=no");
			}
			function popup_small(datei, b, h) {
			  var b = 400;
			  var h = 340;
			  var x = screen.width/2 - b/2;
			  var y = screen.height/2 - h/2;
			  fenster = window.open(datei, "popup", "width="+b+", height="+h+", left="+x+", top="+y+", scrollbars=auto, resizable=yes");
			}
			function popup_x(datei, b, h) {
			  var x = screen.width/2 - b/2;
			  var y = screen.height/2 - h/2;
			  fenster = window.open(datei, "popup", "width="+b+", height="+h+", left="+x+", top="+y+", scrollbars=auto, resizable=yes");
			}
      		function popup_scroll(datei, b, h) {
			  var x = screen.width/2 - b/2;
			  var y = screen.height/2 - h/2;
			  fenster = window.open(datei, "popup", "width="+b+", height="+h+", left="+x+", top="+y+", scrollbars=yes, resizable=yes");
			}
			<!--
			function return_date(){
				var Datum = new (Date);
				var Tag = Datum.getDate();
				var Wochentag = Datum.getDay();
				var Monat = Datum.getMonth();
				var Jahr = Datum.getFullYear();
				var Tagname = new Array("Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday");
				var Monatname = new Array("January","February","March","April","May","June","July","August","September","October","November","December");
				var Stunde = Datum.getHours();
				var Minute = Datum.getMinutes();
				if(Minute<10)
				{
					Minute = "0" + Minute;
				}
				if(Stunde<10)
				{
					Stunde = "0" + Stunde;
				}
				return (Tagname[Wochentag]+", "+Monatname[Monat]+" "+Tag+", "+Jahr+" "+Stunde+":"+Minute);
				
			}