function swap(elt){
	var img1 = elt.getElementsByTagName("img")[0];
	var img2 = elt.getElementsByTagName("img")[1];
	if (img2.src.indexOf("fileadmin",0) != -1) {
		var tmp = img1.src;
		img1.src=img2.src;
		img2.src=tmp;
	}
}