var timeout    = 300;
var closetimer = 0;
var ddmenuitem = 0;

function menu_open()
{
	$(this).addClass('hover');
	menu_canceltimer();
	menu_close();
	ddmenuitem = $(this).find('.dropdown').css('visibility', 'visible');
}

function menu_close()
{
	if(ddmenuitem)
	ddmenuitem.css('visibility', 'hidden');
}

function menu_timer()
{
	$(this).removeClass('hover');
	closetimer = window.setTimeout(menu_close, timeout);
}

function menu_canceltimer()
{
	if(closetimer)
		{
			window.clearTimeout(closetimer);
			closetimer = null;
		}
}

$(document).ready(function()
{
	$('#mainNavBtns > li').bind('mouseover', menu_open)
	$('#mainNavBtns > li').bind('mouseout',  menu_timer)
});

document.onclick = menu_close;