function showSubMenu(obj)
{
if(document.getElementById(obj).style.display == 'none') {
	document.getElementById(obj).style.display = 'block';
	var docName = document.getElementById(obj).getAttribute("name");
	document.getElementById(obj).previousSibling.setAttribute("title", "Das Untermenü zu '"+ docName +"' einklappen");
}
else {
	document.getElementById(obj).style.display = 'none';
	var docName = document.getElementById(obj).getAttribute("name");
	document.getElementById(obj).previousSibling.setAttribute("title", "Das Untermenü zu '"+ docName +"' ausklappen");
}
}