$(document).ready( 
			
			function()
			{
				var timeout = 50;
				var closetimer = 0;
				var ddmenuitem = 0;
				
				function MenuDeroulant_open()
				{
					MenuDeroulant_canceltimer();
					MenuDeroulant_close();
					ddmenuitem = $(this).find('ul').css('visibility', 'visible');
				}
				
				function MenuDeroulant_close()
				{
					if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');
				}
				
				function MenuDeroulant_timer()
				{
					closetimer = window.setTimeout(MenuDeroulant_close, timeout);
				}
				
				function MenuDeroulant_canceltimer()
				{
					if(closetimer)
					{
						window.clearTimeout(closetimer);
						closetimer = null;
					}
				}
				
				$(document).ready(function()
					{
						$('#nav > li').bind('mouseover', MenuDeroulant_open)
						$('#nav > li').bind('mouseout',  MenuDeroulant_timer)
					}
				);
				
				document.onclick = MenuDeroulant_close;
			}
		);