function toggle(obj) {
	var x = document.getElementById(obj);
	if ( x.style.display != "none" ) {
		x.style.display = 'none';
	}
	else {
		x.style.display = '';
	}
}

function popup(url)
{
	popup = window.open(url, 'popupvenster', 'width=420, height=550, resizable=no, menubar=no, scrollbars=yes, status=no, toolbar=no');
}