/*
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 = 1000;


// Indicator class
var menuMarker = "menuMarker";

// 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 initDynMenu()
{
    // get some element
    var menu = document.getElementById('menu'); // 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='menu';
    
    // 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
            addEvent(lis.item(i),'keyup',show);

            // link events to list item
            addEvent(lis.item(i),'mouseover',show);
            addEvent(lis.item(i),'mouseout',timeoutHide);
            addEvent(lis.item(i),'blur',timeoutHide);
            addEvent(lis.item(i),'focus',show);
            
            // add an id to list item
            lis.item(i).setAttribute( 'id', "li"+i );
            var myClass = lis.item(i).getElementsByTagName('a')[0].className;

            myClass = myClass == null ? menuMarker : myClass + " " + menuMarker;
            
            lis.item(i).getElementsByTagName('a')[0].className = myClass;
            
        }
    }
}

function addEvent(target, eventType, functionName){
    if (target.addEventListener){
        target.addEventListener(eventType, functionName, true);
        return true;
    }
    else if (target.attachEvent)
    {
        //var r = target.attachEvent("on"+eventType, functionName);
        //return r;
   	    eval('target.on'+eventType+'=functionName');
   	    return false;
    }
    else
    {
        return false;
    }
}

// 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';
    }
}