/*
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(rootId){
    // 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(rootId); // 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=rootId;
        // 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';
    }
}