var shown = false;
var hideTimeout = false;
function doHideMenu(id) {
	document.getElementById(id).style.display = 'none';
	document.getElementById(id + 'link').removeAttribute('class');
	document.getElementById(id + 'link').removeAttribute('className');
	shown = id;
	return true;
}
function showMenu(id) {
	window.clearTimeout(hideTimeout);
	if (shown) {
		document.getElementById(shown).style.display = 'none';
		document.getElementById(shown + 'link').removeAttribute('class');
		document.getElementById(shown + 'link').removeAttribute('className');
	}
	document.getElementById(id).style.display = 'block';
	document.getElementById(id + 'link').setAttribute('class', 'aktiv');
	document.getElementById(id + 'link').setAttribute('className', 'aktiv');
	shown = id;
	return true;
}
function hideMenu(id) {
	hideTimeout = window.setTimeout("doHideMenu('" + id + "');", 500);
	return true;
}