/* dropdownnavi.js */

var TimeOut         = 300;
var currentLayer    = null;
var currentitem     = null;
var currentLayerNum = 0;
var noClose         = 0;
var closeTimer      = null;

function submenu_open(n){
	var l  = document.getElementById("menu"+n);
	var mm = document.getElementById("mmenu"+n);

	if(l) {
		submenu_cancelclosetime();
		l.style.visibility='visible';
		if(currentLayer && (currentLayerNum != n))
			currentLayer.style.visibility='hidden';
		currentLayer = l;
		currentitem = mm;
		currentLayerNum = n;
	}else if(currentLayer){
		currentLayer.style.visibility='hidden';
		currentLayerNum = 0;
		currentitem = null;
		currentLayer = null;
	}
}

function submenu_closetime(){ closeTimer = window.setTimeout(submenu_close, TimeOut); }

function submenu_cancelclosetime(){
	if(closeTimer) {
		window.clearTimeout(closeTimer);
		closeTimer = null;
	}
}

function submenu_close(){
	if(currentLayer && noClose!=1){
		currentLayer.style.visibility='hidden';
		currentLayerNum = 0;
		currentLayer = null;
		currentitem = null;
	}else{
		noClose = 0;
	}
	currentLayer = null;
	currentitem = null;
}

/* document.onclick = submenu_close; */