var banner = new Array();
banner[0] = "layout/banner/petzl_banner.gif";
banner[1] = "layout/banner/vaude_banner.gif";
banner[2] = "layout/banner/pizbuch_banner.gif";
banner[3] = "layout/banner/climbing_lodge_banner.gif";
var alt = new Array();
alt[0] = "Equipment and techniques for verticality - Headlamps";
alt[1] = "The Spirit of Mountain Sports";
alt[2] = "DER alpine Buchshop in Zuerich";
alt[3] = "Climbing Lodge El Chorro";
var title = new Array();
title[0] = "Equipment and techniques for verticality - Headlamps";
title[1] = "The Spirit of Mountain Sports";
title[2] = "DER alpine Buchshop in Zuerich";
title[3] = "Climbing Lodge El Chorro";
var url = new Array();
url[0] = "http://www.petzl.de";
url[1] = "http://www.vaude.de/hps/client/vaude/public/hxfront/index.hbs/outdoor/en";
url[2] = "http://www.pizbube.ch/cont_user/index.cfm";
url[3] = "http://www.klettern-in-spanien.de";
var timer = 10000; 
var arraylaenge = banner.length;
var index = Math.floor(Math.random() * arraylaenge);
var bannerstring = '<a title="' + title[index] + '" href="' + url[index] + '" target="_blank"><img src="' + banner[index] + '" alt="' + alt[index] + '" border=0></a>';
function bannerwechsel () {
if (index == arraylaenge-1) {
index = 0;
} else {
index++;
}
bannerstring = '<a title="' + title[index] + '" href="' + url[index] + '" target="_blank"><img src="' + banner[index] + '" alt="' + alt[index] + '" border=0></a>';
document.getElementById("bannerjs").innerHTML = bannerstring;
setTimeout("bannerwechsel()", timer);
}
function banneranzeige () {
document.getElementById("bannerjs").innerHTML = bannerstring;
bannerwechsel();
}