$(document).ready(function () {	
				
			$('#nav li').hover(
				function () {
					//show its submenu
					$('ul', this).slideDown(200);
		
				}, 
				function () {
					//hide its submenu
					$('ul', this).slideUp(200);			
				}
			);
			
				$('#nav2 li').hover(
				function () {
					//show its submenu
					$('ul', this).slideDown(200);
		
				}, 
				function () {
					//hide its submenu
					$('ul', this).slideUp(200);			
				}
			);
			
				$('#nav24 li').hover(
				function () {
					//show its submenu
					$('ul', this).slideDown(200);
		
				}, 
				function () {
					//hide its submenu
					$('ul', this).slideUp(200);			
				}
			);
			
		});