function popup(url,typ,para1,width,height)
{
	attrib = "";
	Y = (screen.height - width) / 2;
	X = (screen.width - height) / 2;
	X = Math.round(X);
	Y = Math.round(Y);
	if (para1 == 'CENTER') {attrib += 'height=' + height + ',width=' + width + ',top=' + Y + ',left=' + X;}
	if (typ == 'TYP1') {attrib += ",scrollbars=no";}
	if (typ == 'TYP2') {attrib += ",scrollbars=yes";}
	if (typ == 'TYP3') {attrib += ",scrollbars=yes,menubar=yes";}
	x = Math.random();
	fenster = window.open(url, 'win', attrib);
	return false;
}