/*
Author   : bieler batiste
Company  : doSimple : http://www.dosimple.ch
send me a mail for more informations : faden@PASDEPOURRIELaltern.org - remove ( PASDEPOURRIEL )

Short javascript function to create and handle a CSS navigation menu

Copyright (C) 2004  Bieler Batiste

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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

// the timeout for the menu
var timeout = 100;

// not very clean but simple
// the function can be run in the HTML for faster display
// window.onload=initMenu;

// creat timeout variables for list item
// it's for avoid some warning with IE
for( var i = 0; i < 100; i++ )
{
  eval("var timeoutli" + i + " = false;");
}

// this fonction apply the CSS style and the event
function initMenu(menuid)
{
  // a test to avoid some browser like IE4, Opera 6, and IE Mac
  if ( browser.isDOM1 
      && !( browser.isMac && browser.isIE ) 
      && !( browser.isOpera && browser.versionMajor < 7 )
      && !( browser.isIE && browser.versionMajor < 5 ) )
  {
    // get some element
    var menu = document.getElementById(menuid); // the root element
    var lis = menu.getElementsByTagName('li'); // all the li

    // change the class name of the menu, 
    // it's usefull for compatibility with old browser
    menu.className=menuid;

    // i am searching for ul element in li element
    for ( var i=0; i<lis.length; i++ )
    {
      // is there a ul element ?
      if ( lis.item(i).getElementsByTagName('ul').length > 0 )
      {        
        // improve IE key navigation
        if ( browser.isIE )
        {
          addAnEvent(lis.item(i),'keyup',show);
        }
        // link events to list item
        addAnEvent(lis.item(i),'mouseover',show);
        addAnEvent(lis.item(i),'mouseout',timeoutHide);
        addAnEvent(lis.item(i),'blur',timeoutHide);
        addAnEvent(lis.item(i),'focus',show);

        // add an id to list item
        lis.item(i).setAttribute( 'id', "li"+i );
        lis.item(i).getElementsByTagName('a')[0].className = 'menuIndicateur';
      }
    }
    menu.style.visibility="visible"; 
  }
}

function addAnEvent( target, eventName, functionName )
{
  // apply the method to IE
  if ( browser.isIE )
  {
    //attachEvent dont work properly with this
    eval('target.on'+eventName+'=functionName');
  }
  // apply the method to DOM compliant browsers
  else
  {
    target.addEventListener( eventName , functionName , true ); // true is important for Opera7
  }
}

// hide the first ul element of the current element
function timeoutHide()
{
  // start the timeout
  eval( "timeout" + this.id + " = window.setTimeout('hideUlUnder( \"" + this.id + "\" )', " + timeout + " );");
}

// hide the ul elements under the element identified by id
function hideUlUnder( id )
{   
  document.getElementById(id).getElementsByTagName('ul')[0].style['visibility'] = 'hidden';
}

// show the first ul element found under this element
function show()
{
  // show the sub menu
  this.getElementsByTagName('ul')[0].style['visibility'] = 'visible';
  // clear the timeout
  eval ( "clearTimeout( timeout"+ this.id +");" );
  hideAllOthersUls( this );
}

// hide all ul on the same level of  this list item
function hideAllOthersUls( currentLi )
{
  var ul = currentLi.parentNode;
  //alert(lis.childNodes.length);
  for ( var i=0; i<ul.childNodes.length; i++ )
  {
    if ( ul.childNodes[i].id && ul.childNodes[i].id != currentLi.id )
    {
      hideUlUnderLi( ul.childNodes[i] );
    }
  }
}

// hide all the ul wich are in the li element
function hideUlUnderLi( li )
{
  var uls = li.getElementsByTagName('ul');
  for ( var i=0; i<uls.length; i++ )
  {
    uls.item(i).style['visibility'] = 'hidden';
  }
}