/*

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;



// 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()

{

    // 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('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

                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 );

            }

        }

    }

}



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';

    var currentNode=this;

    while(currentNode)

    {

            if( currentNode.nodeName=='LI')

            {

                currentNode.getElementsByTagName('a')[0].className = 'linkOver';

            }

            currentNode=currentNode.parentNode;

    }

    // 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 lis = currentLi.parentNode;

    for ( var i=0; i<lis.childNodes.length; i++ )

    {

        if ( lis.childNodes[i].nodeName=='LI' && lis.childNodes[i].id != currentLi.id )

        {

            hideUlUnderLi( lis.childNodes[i] );

        }

    }

}



// hide all the ul wich are in the li element

function hideUlUnderLi( li )

{

    var as = li.getElementsByTagName('a');

    for ( var i=0; i<as.length; i++ )

    {

        as.item(i).className="";

    }

    var uls = li.getElementsByTagName('ul');

    for ( var i=0; i<uls.length; i++ )

    {

        uls.item(i).style['visibility'] = 'hidden';

    }

}