/***************************************************************************
							DROP_DOWN MENU SCRIPT
***************************************************************************/


var timeout	= 100;
var closetimer	= 0;
var ddmenuitem	= 0;

// open hidden layer
function mopen(id){	// cancel close timer
	mcancelclosetime(); // close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden'; // get new layer and show it
	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;
	}
} // close layer when click-out
document.onclick = mclose;