function preload_images(ebene) {
var pfad = "";
if (ebene == 1) pfad = "../";

button1_off = new Image();
button1_off.src = pfad + "images/button1_off.gif";
button1_on = new Image();
button1_on.src = pfad + "images/button1_on.gif";

button2_off = new Image();
button2_off.src = pfad + "images/button2_off.gif";
button2_on = new Image();
button2_on.src = pfad + "images/button2_on.gif";
}

function hl (imgDocID,imgObjName) {
document.images[imgDocID].src = eval (imgObjName + ".src");
	}
	
function fenster(datei,name,breite,hoehe) 
{
   MeinFenster =
//   window.open(datei, name, "width=360,height=260,scrollbars=yes");
   window.open(datei, name, "width=" + breite + ",height=" + hoehe + ",resizable=yes,scrollbars=yes,toolbar=yes");
   MeinFenster.focus();
}