function changer(nummer) {
	var step;
	step = nummer;
	step = step+1
	if( step > 5 ) {
		step = 1;
	}
	document.getElementById('teaserchanger').style.backgroundImage = 'url(../custom/bilder/4_header0' + step + '.jpg)';
	window.setTimeout('changer(' + step + ')', 4000);
		$('teaserchanger').set('opacity', 0);
		$('teaserchanger').fade('in');
}