function fenster(strLink, w, h, scrollbars) {
	openwindow = window.open( strLink,'popup',
		"toolbar=no,directories=no,menubar=no,location=no,status=yes,resizable=yes,scrollbars=" + scrollbars + ",width=" + w + ",height=" + h);
   
	if(openwindow != null) {
		if(openwindow.opener == null) {
			openwindow.opener=self;
		}
	}
	
	return false;
}