function clickMenu(module, level, menu){
	var uls = document.getElementsByTagName('ul'); 
	var i, item; 
	for (i=0; i<uls.length; i++) { 
		item = uls[i]; info = item.id.split('-'); 
		if ((info.length==4) && (info[0]=='menu') && (info[1]==module) && (info[2]==level)) {
			if (item.id=='menu-'+module+'-'+ level + '-' + menu) { 
				item.style.display = item.style.display=='none' ? 'block' : 'none'; 
			} else {
				item.style.display='none'; 
			}
		}
	}
}