function navi()
{
var pos, b1,b2;
b1= new Image();
b2= new Image();

b1.src= "./images/pi_tr.gif";
b2.src= "./images/logo_frei.jpg";

}
function reset () {
if (pos!=5) document.images[5].src="./images/pi_tr.gif";
if (pos!=6) document.images[6].src="./images/pi_tr.gif";
if (pos!=7) document.images[7].src="./images/pi_tr.gif";
if (pos!=8) document.images[8].src="./images/pi_tr.gif";
if (pos!=9) document.images[9].src="./images/pi_tr.gif";
if (pos!=10) document.images[10].src="./images/pi_tr.gif";


return
}

function over (n) {
pos=-1;
var s;

if (n == 5) s="./images/logo_frei.jpg";
if (n == 6) s="./images/logo_frei.jpg";
if (n == 7) s="./images/logo_frei.jpg";
if (n == 8) s="./images/logo_frei.jpg";
if (n == 9) s="./images/logo_frei.jpg";
if (n == 10) s="./images/logo_frei.jpg";



reset();
if (pos!=n) document.images[n].src=s;
return
}