var isIE  = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
var opened_submenu;
var last_obj_a;

function open_submenu(obj_a,childs,name) {

        if (isIE) {
                if (obj_a) {
                        if (obj_a.parentNode) {
                                var li = obj_a.parentNode;
                                if (li.className != 'active') li.className = 'hover';
                        }
                }
        }

	if (childs == 1) {
		if ( ! document.getElementById(name) )
			return false;

        	var obj = document.getElementById(name);
		obj.style.visibility='visible';
		opened_submenu=name;
		
	}
	if (last_obj_a && name)
		last_obj_a.parentNode.className='active';

}

function close_submenu(obj_a,childs) {
	if (!opened_submenu) return false;


	if (isIE) {
		if (obj_a) {
			if (obj_a.parentNode) {
				var li = obj_a.parentNode;
				if (li.className != 'active') li.className = '';
			}
		}
	}


	document.getElementById(opened_submenu).style.visibility='hidden';
}