var sponsorbild="quelle.gif";
var sponsorlink="http://www.quelle.de";
function sponsor() {
	if (sponsorbild=="quelle.gif") {
		sponsorbild="post.gif";
		var sponsorlink="http://www.post.de";
	}
	else if (sponsorbild=="post.gif") {
		sponsorbild="nergy.gif";
		var sponsorlink="http://www.n-ergie.de";
	}
	else if (sponsorbild=="nergy.gif") {
		sponsorbild="quelle.gif";
		var sponsorlink="http://www.quelle.de";
	}
	document.getElementsByName("sponsor")[0].src="http://static.challenge-roth.com/de/images/"+sponsorbild;
	document.getElementsByName("sponsorlink")[0].href=sponsorlink;
	setTimeout("sponsor()",3000);
}