var timeout         = 500;
var closetimer		= 0;
var ddmenuitem      = 0;

function amenu_open()
{	amenu_canceltimer();
	amenu_close();
	ddmenuitem = $(this).find('ul').eq(0).css('visibility', 'visible');}

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

function amenu_timer()
{	closetimer = window.setTimeout(amenu_close, timeout);}

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

document.onclick = amenu_close;