/*
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;");
}
eval("var timeoutul = 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('menudyn'); // the root element
		var lis = menu.getElementsByTagName('li'); // all the li
		var uls = menu.getElementsByTagName('ul'); // all the il

		// change the class name of the menu, 
		// it's usefull for compatibility with old browser
		menu.className='menudyn';

		// 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 )
{   
	node=document.getElementById(id);
	node.getElementsByTagName('a')[0].className=""
    node.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';
    }
}