/*****************************************
 * JavaScript: ddm.js  1.0
 * 
 * last updated on 2010.10.16
 * (c) 2009 swoop inc.
 * 
 *****************************************/
var timeout = 100;
var closetimer	 = 0;
var ddmenuitem = 0;

// open hidden layer
function mopen(id){	
	mcancelclosetime();
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
}

// close showed layer
function mclose(){
	if(ddmenuitem) ddmenuitem.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;
	}
}

document.onclick = mclose;