//*** MAIN MENU **********************************************************************************************************************************

		var timeout	= 200;
		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;