// create timeout variables for list item
// it's for avoid some warning with IE
for( var i = 0; i < 500; 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
		// 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 for timeout
				lis.item(i).setAttribute( 'id', "li"+i );
			}
		}
	}
}

function addAnEvent( target, eventName, functionName )
{
	// apply the method to IE
	if ( browser.isIE ) { eval('target.on'+eventName+'=functionName');} //attachEvent dont work properly with this
	 // 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 
// the timeout for the menu
var xtimeout = 1000;
	this.className=this.className.replace(new RegExp("hover\\b"), "");
	eval( "timeout" + this.id + " = window.setTimeout('hideUlUnder( \"" + this.id + "\" )', " + xtimeout + " );");
}

// 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';
	this.getElementsByTagName('ul')[0].style['display'] = 'block';
	if(this.className.indexOf("hover") < 0)this.className+=" hover";
	// 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 ul = currentLi.parentNode;
	//alert(lis.childNodes.length);
	for ( var i=0; i<ul.childNodes.length; i++ )
	{
		if ( ul.childNodes[i].id && ul.childNodes[i].id != currentLi.id )
		{
			hideUlUnderLi( ul.childNodes[i] );
		}
	}
}

// hide all the ul wich are in the li element
function hideUlUnderLi( li )
{
	var uls = li.getElementsByTagName('ul');
	for ( var i=0; i<uls.length; i++ )
	{
		uls.item(i).style['visibility'] = 'hidden';
	}
}