//bildwechsel
var OhneMaus1 = new Image();
OhneMaus1.src = "../images/photo170_u.jpg";
var MitMaus1 = new Image();
MitMaus1.src = "../images/photo170_d.jpg";

var OhneMaus2 = new Image();
OhneMaus2.src = "../images/theo170_u.jpg";
var MitMaus2 = new Image();
MitMaus2.src = "../images/theo170_d.jpg";

var OhneMaus3 = new Image();
OhneMaus3.src = "../images/geoinform170_u.jpg";
var MitMaus3 = new Image();
MitMaus3.src = "../images/geoinform170_d.jpg";




function bildwechsel(index, objektname)
{
 window.document.images[index].src = objektname.src;
}