var menu_visible_div;

function find_submenu (a)
{
	var s = a.parentNode.tagName == 'DIV' ? a : a.parentNode;
	while (s.nextSibling && s.nextSibling.nodeType != 1)
		s = s.nextSibling;

	return !s.nextSibling ? null : s.nextSibling.tagName == 'DIV' ? s.nextSibling : null ;
}

function menu_init ()
{
	var as = document.getElementById ('menutop').getElementsByTagName ('a');
	for (var i = 0; i < as.length; i++)
		if (as[i].className == 'leftmenu') {
			var s = find_submenu (as[i]);
			if (s) {
				var a = s.getElementsByTagName ('a'), display = 'none';
				for (var j = 0; j < a.length; j++)
					if (a[j].href == window.location.href.replace (/\?.*/, ''))
						display = '';
				s.style.display = display;
				if (display == '')
					menu_visible_div = s;

				as[i].onclick = function () {
					var s = find_submenu (this);

					if (s.style.display == '') {
						menu_visible_div = null;
						s.style.display = 'none';
					} else {
						if (menu_visible_div)
							menu_visible_div.style.display = 'none';

						menu_visible_div = s;
						s.style.display = '';
					}

					if (window.navigator.userAgent.indexOf ('MSIE 6.0') != -1) {
						document.getElementById ('leftmenubtm').style.display = 'none';
						document.getElementById ('leftmenubtm').style.display = '';
						document.getElementById ('box').style.display = 'none';
						document.getElementById ('box').style.display = '';
					}

					return false;
				};
			}
		}
}