// popup
function popup(name,xKo,yKo){
	var breite = xKo;
	var hoehe = yKo;
	var posX=(screen.availWidth-breite)/2;
	var posY=(screen.availHeight-hoehe)/2;
    window.open(name,"popup", "toolbar=no,width="+breite+",height="+hoehe+",directories=no,status=no,scrollbars=no,resize=no,resizable=no,menubar=no,screenX=" + posX + ",screenY=" + posY + ",left=" + posX + ",top=" + posY);
}