var diabilder = new Array();
diabilder[0] = new Image(); diabilder[0].src = "images/hahs_gr_raeuml_b.jpg";
diabilder[1] = new Image(); diabilder[1].src = "images/hahs_akt.jpg";
diabilder[2] = new Image(); diabilder[2].src = "images/hahs_pamona.jpg";
diabilder[3] = new Image(); diabilder[3].src = "images/hahs_reichardtstr.jpg";
diabilder[4] = new Image(); diabilder[4].src = "images/hahs_schnee.jpg";

var diazaehler = 0;

function diavor()
{
diazaehler ++;
if ( diazaehler >= 5 ) diazaehler = 0;
document.diabild.src = diabilder[diazaehler].src;
}
function diazurueck()
{
diazaehler --;
if ( diazaehler < 0 ) diazaehler = 4;
document.diabild.src = diabilder[diazaehler].src;
}