Normal1 = new Image();
Normal1.src = "bts/home.gif";

Highlight1 = new Image();
Highlight1.src = "bts/home_a.gif";

Normal2 = new Image();
Normal2.src = "bts/cad.gif";

Highlight2 = new Image();
Highlight2.src = "bts/cad_a.gif";

Normal3 = new Image();
Normal3.src = "bts/cam.gif";

Highlight3 = new Image();
Highlight3.src = "bts/cam_a.gif";

Normal4 = new Image();
Normal4.src = "bts/mail.gif";

Highlight4 = new Image();
Highlight4.src = "bts/mail_a.gif";

Normal5 = new Image();
Normal5.src = "bts/imp.gif";

Highlight5 = new Image();
Highlight5.src = "bts/imp_a.gif";


function Bildwechsel(Bildnr,Bildobjekt) {
 window.document.images[Bildnr].src = Bildobjekt.src;
}