var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

function mopen(id){	
	mcancelclosetime();
	
	if(ddmenuitem){ 
		ddmenuitem.css('visibility','hidden');
	}

	ddmenuitem = $("#submenublock_"+id); 
	ddmenuitem.css('visibility','visible');

}

function mclose(){
	if(ddmenuitem) ddmenuitem.css('visibility','hidden');
}

function mclosetime(){
	closetimer = window.setTimeout(mclose, timeout);
}

function mcancelclosetime(){
	if(closetimer){
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}
 
document.onclick = mclose;