$(document).ready(function() {
	var tSubmenu = 400;
	var submenuHeight = 30;
		
	$('li.submenu').each(function() {
		var $el = $(this);
		var $submenu = $el.find('ul.level_2');
		$el.hover(
			function() {
				$submenu.stop().animate({
					height: submenuHeight
				}, tSubmenu);
			},
			function() {
				$submenu.stop().animate({
					height: 0
				}, tSubmenu);
			}
		);	
	});
})