function changeMainImage(uid, image_small, image_big, headline)
{
	$('mainBild_'+uid).innerHTML = '<img src="' + image_small + '" alt="' + headline + '" title="' + headline + '" border="0" /> ';
	$('mainBild_'+uid).href      = image_big;
	$('mainBild_'+uid).alt       = headline;
	$('mainBild_'+uid).title     = headline;
	return false;
}