function menu () {
	$$('#left-menu a').each(function(objElement) {
		// If no have <ul> next tag - no have submenu.
		if (!(objSubmenu = objElement.next('ul'))) {
			return;
		}

		if (objElement.up().getElementsByClassName('current').length) {
			var bActive = true;
		} else {
			var bActive = false;
		}

		// Hide submenu if have not active element into it.
		if (!bActive) {
			objSubmenu.hide();
		}

		// Clear link.
		if (objElement.href == '') {
			objElement.href = '#';
		}

		// Attach onClick event for show submenu if link no have page.
		if (objElement.href.substring(objElement.href.length - 1) == '#') {
			Event.observe(objElement, 'click', function(event) {
				if (objSubmenu = Event.element(event).next()) {
					// Hide all siblings submenu.
					/*Event.element(event).up().siblings().each(function(objSiblingMenu) {
						if (objSiblingSubmenu = objSiblingMenu.down().next('ul')) {
							objSiblingSubmenu.hide();
						}
					});*/

					objSubmenu.toggle();
					Event.stop(event);
				}
			});
		}
	});
}