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

function jsddm_open()
{  
	jsddm_canceltimer();
	jsddm_close();
	ddmenuitem = $(this).find('ul').css('visibility', 'visible');
}
function jsddm_close()
{  
	if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');
}
function jsddm_timer()
{
	closetimer = window.setTimeout(jsddm_close, timeout);
}
function jsddm_canceltimer()
{  
	if(closetimer)
	{  
		window.clearTimeout(closetimer);
		closetimer = null;
    }
}
$(document).ready(function()
{  
	$('#jsddm > li').bind('mouseover', jsddm_open);
	$('#jsddm > li').bind('mouseout',  jsddm_timer);
});
document.onclick = jsddm_close;