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(){
	$('ul#hnavi > li.menu01').bind('mouseover', jsddm_open);
	$('ul#hnavi > li.menu01').bind('mouseout',  jsddm_timer);
	$('ul#hnavi > li.menu02').bind('mouseover', jsddm_open);
	$('ul#hnavi > li.menu02').bind('mouseout',  jsddm_timer);
	$('ul#hnavi > li.menu03').bind('mouseover', jsddm_open);
	$('ul#hnavi > li.menu03').bind('mouseout',  jsddm_timer);
	$('ul#hnavi > li.menu04').bind('mouseover', jsddm_open);
	$('ul#hnavi > li.menu04').bind('mouseout',  jsddm_timer);
});
document.onclick = jsddm_close;