/*
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 timeoutliD" + i + " = false;");
    eval("var timeoutliG" + 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 menuD = document.getElementById('menuDUl'); // the root element
        var lisD = menuD.getElementsByTagName('li'); // all the li

        var menuG = document.getElementById('menuGUl'); // the root element
        var lisG = menuG.getElementsByTagName('li'); // all the li
        
        // change the class name of the menu, 
        // it's usefull for compatibility with old browser
        menuD.className='menu';
        menuG.className='menu';
        
        // i am searching for ul element in li element
        for ( var i=0; i<lisD.length; i++ ) {
            // is there a ul element ?
            if ( lisD.item(i).getElementsByTagName('ul').length > 0 ) {
                // improve IE key navigation
                if ( browser.isIE ) {
                    addAnEvent(lisD.item(i),'keyup',show);
                }
                // link events to list item
                addAnEvent(lisD.item(i),'mouseover',show);
                addAnEvent(lisD.item(i),'mouseout',timeoutHide);
                addAnEvent(lisD.item(i),'blur',timeoutHide);
                addAnEvent(lisD.item(i),'focus',show);
                
                // add an id to list item
                lisD.item(i).setAttribute( 'id', "liD"+i );
            }
        }

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

                // add an id to list item
                lisG.item(j).setAttribute( 'id', "liG"+j );
            }
        }
        
        $('menuDUl').style.display='block';
        $('menuGUl').style.display='block';
    }
}

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') {
                if (currentNode.getElementsByTagName('a').length!=0) {
                    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';
    }
}