var fenster = null;
function winOpen (url) {
 	fenster = window.open(url, "win1", "width=800,height=600,status=yes,scrollbars=yes,resizable=yes");
 	fenster.focus();
}

function winClose(){
	if(fenster){
		fenster.close();
	}
}

function sicher(){
	return confirm('Sind Sie sicher?');
}