function popup(target) {
	var foo;
	foo = window.open(target, 'Popup', 'width=650,height=400,top=20,left=20,scrollbars=yes,resizable=yes');
	return true;
}


function toggleInfobox (id_infobox) {

	// die elemente in die variablen laden
	var handle_infobox = document.getElementById(id_infobox);

	if (handle_infobox.style.display == 'none' || handle_infobox.style.display == '') {
		// einblenden (unsichtbar)
		handle_infobox.style.display = 'block';

	} else {
		// ausblenden
		handle_infobox.style.display = 'none';

	}
}