/**********************************************************************
* /js/component/menu.js
* Copyright (C) 2007-2008 Kyoto University
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* 
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
* 
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-
* 1301  USA
***********************************************************************/
// JavaScript Document

            
/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Konstantin Jagello | http://javascript-array.com/ */

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

function mopen(n) {
  var l  = document.getElementById("menu"+n);
  var mm = document.getElementById("mmenu"+n);
	
  if(l) {
    mcancelclosetime();
    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 mclosetime() {
  closeTimer = window.setTimeout(mclose, TimeOut);
}

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

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

document.onclick = mclose;