var activeNum = '0';

function over(num) {
	elem = document.getElementById('li_'+num);
	
	if (num != activeNum) {
		
		// aktives element normalisieren
		elemActive = document.getElementById('li_'+activeNum);
		elemActive.className = '';
		
		// aktives submenu ausblenden
		if (elemActiveUL = document.getElementById('ul_'+activeNum)) {
			elemActiveUL.style.visibility = 'hidden';
		}
		
		// element hervorheben
		elem.className = 'cur';
		
		// element submenu einblenden
		if (elemUL = document.getElementById('ul_'+num)) {
			elemUL.style.visibility = 'visible';
		}
	}
}

function out(num) {
	elem = document.getElementById('li_'+num);
	
	if (num != activeNum) {
		// element normalisieren
		elem.className = '';
		
		// element submenu ausblenden
		if (elemUL = document.getElementById('ul_'+num)) {
			elemUL.style.visibility = 'hidden';
		}
		
		// aktives element hervorheben
		elemActive = document.getElementById('li_'+activeNum);
		elemActive.className = 'cur';
		
		// aktives submenu einblenden
		if (elemActiveUL = document.getElementById('ul_'+activeNum)) {
			elemActiveUL.style.visibility = 'visible';
		}
	}
}