// JavaScript Document
var timeout	= 1000;
var closetimer	= 0;
var ddmenuitem	= 0;
var ddmenuitem_sub=0;

// open hidden layer
function mopen(id)
{	
	//document.write(id);
	// cancel close timer
	mcancelclosetime();
	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	if(ddmenuitem_sub) ddmenuitem_sub.style.visibility = 'hidden';
	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
}
//
function nopen(id)
{	
	
	// cancel close timer
	mcancelclosetime();
	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'visible';
	// get new layer and show it
	ddmenuitem_sub = document.getElementById(id);
	ddmenuitem_sub.style.visibility = 'visible';
}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	if(ddmenuitem_sub) ddmenuitem_sub.style.visibility = 'hidden';
}

// go close timer
function mclosetime(){
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime(){
	if(closetimer){
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}
// close layer when click-out
document.onclick = mclose;