/*
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;");
}

function cacheMenu(id)
{
	document.getElementById(id).getElementsByTagName('ul')[0].style['visibility'] = 'hidden';
	document.getElementById(id).getElementsByTagName('ul')[1].style['visibility'] = 'hidden';
	document.getElementById(id).getElementsByTagName('ul')[2].style['visibility'] = 'hidden';
	document.getElementById(id).getElementsByTagName('ul')[3].style['visibility'] = 'hidden';
	document.getElementById(id).getElementsByTagName('ul')[4].style['visibility'] = 'hidden';
	document.getElementById(id).getElementsByTagName('ul')[5].style['visibility'] = 'hidden';
	document.getElementById(id).getElementsByTagName('ul')[6].style['visibility'] = 'hidden';
	document.getElementById(id).getElementsByTagName('ul')[7].style['visibility'] = 'hidden';
	document.getElementById(id).getElementsByTagName('ul')[8].style['visibility'] = 'hidden';
}


// this fonction apply the CSS style and the event
function initMenu(menuId,menuClass)
{
		// 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(menuId); // 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=menuClass;
				
//				alert('debug : '+menuId+' '+menuClass);

				// 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';
		}
}