/*
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
*/


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


var timeoutliarr = new Array();
var rootdivid="unknownrootdivid";
var rootcssclass="unknownrootcssclass";

// this fonction apply the CSS style and the event
function initMenu()
{
//	alert("init");
//alert("engine:"+Browser.Engine.name+", version:"+Browser.Engine.version);

    // a test to avoid some browser like IE4, Opera 6, and IE Mac
    if ( !( Browser.Platform.mac && Browser.Engine.trident ) 
    && !( Browser.Engine.presto && Browser.Engine.version < 925 )
    && !( Browser.Engine.trident && Browser.Engine.version < 4 ) )
    {
        // get some element
        var boxdiv = document.getElementById(rootdivid);
        var menu = boxdiv.getElementsByTagName('ul')[0];
        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='menusimpleul';
        // menu.className=rootcssclass+'ul';
        
        // 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.Engine.trident )
                {
                    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', rootdivid + "li" + i );
                //child indicators are done by siteswift
                //lis.item(i).getElementsByTagName('a')[0].className = 'menuIndicateur';
            }
        }
        boxdiv.className=rootcssclass + 'Dyn';		// switch to dynamic styletree
//        alert(boxdiv.className);
    }
}

function XaddEvent(obj, evType, fn){ 
 if (obj.addAnEventListener){ 
   obj.addAnEventListener(evType, fn, true); 
   return true; 
 } else if (obj.attachEvent){ 
  var r = obj.attachEvent("on"+evType, fn); 
  return r; 
 } else { 
   //attachEvent dont work properly with this
     eval('obj.on'+evType+'=fn'); 
 } 
}


function addAnEvent( target, eventName, functionName )
{
    // apply the method to IE
    if ( Browser.Engine.trident )
    {
        //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
    }
}

function removeAnEvent( target, eventName, functionName )
{
    // apply the method to IE
    if ( Browser.Engine.trident )
    {
        //attachEvent dont work properly with this
        eval('target.on'+eventName+'=null');
    }
    // apply the method to DOM compliant browsers
    else
    {
        target.removeEventListener( eventName , functionName , true ); // true is important for Opera7
    }
}
    
// hide the first ul element of the current element
function timeoutHide()
{
   // start the timeout
    eval( "timeoutliarr['timeout" + this.id + "'] = window.setTimeout('hideUlUnder( \"" + this.id + "\" )', " + 20 /* 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( timeoutliarr['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';
    }
} 

function disableMenuEvents() {
    // a test to avoid some browser like IE4, Opera 6, and IE Mac
    if ( !( Browser.Platform.mac && Browser.Engine.trident ) 
    && !( Browser.Engine.presto && Browser.Engine.version < 925 )
    && !( Browser.Engine.trident && Browser.Engine.version < 4 ) )
    {
        // get some element
        var boxdiv = document.getElementById(rootdivid);
        var menu = boxdiv.getElementsByTagName('ul')[0];
        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='menusimpleul';
        menu.className=rootcssclass+'ul';
        
        // 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.Engine.trident )
                {
                    removeAnEvent(lis.item(i),'keyup',show);
                }
                // link events to list item
                removeAnEvent(lis.item(i),'mouseover',show);
                removeAnEvent(lis.item(i),'mouseout',timeoutHide);
                removeAnEvent(lis.item(i),'blur',timeoutHide);
                removeAnEvent(lis.item(i),'focus',show);
                
                // add an id to list item
                //lis.item(i).setAttribute( 'id', rootdivid + "li" + i );
                //child indicators are done by siteswift
                //lis.item(i).getElementsByTagName('a')[0].className = 'menuIndicateur';
            }
        }
    }
}
// not necessary with mooTools
//addAnEvent(window, "unload", disableMenuEvents);