function showSubMenu(identifier) {
	var submenus = $('submenu').immediateDescendants();
	for (i = 0; i < submenus.length; i++) {
		submenus[i].hide();
	}
	$('submenu_' + identifier).show();
}


function toggleVisible(elem, text) {
	element = document.getElementById(elem)
	elementLink = document.getElementById(elem + "Link")
	
	if (element.style.display == 'none') {
		element.style.display = 'block'
		elementLink.innerHTML = text + ' ausblenden'
	} else {
		element.style.display = 'none'
		elementLink.innerHTML = text + ' einblenden»'
	}
}