function popup(url, width, height) {
	pop = "/popup/" + url;
	
	var screenw = screen.availWidth;
	var screenh = screen.availHeight;

	var winw = width;
	var winh = height;
	var posx = (screenw / 2) - (winw / 2) - 15;
	var posy = (screenh / 2) - (winh / 2);

	
	var fenster = window.open(pop,"Stellenanzeige","top="+posy+",left="+posx+",width="+winw+",height="+winh+",menubar=no,locationbar=no,statusbar=no,resizable=no,toolbar=no,dependent=yes,scrollbars=yes");
 	fenster.focus(); 
}