// the timeout for the menu
var timeout = 300;

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

		// 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('div').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('div')[0].style['display'] = 'none';
}

// show the first ul element found under this element
function show() {
	// show the sub menu
	this.getElementsByTagName('div')[0].style['display'] = 'block';
	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('div');
	for ( var i=0; i<uls.length; i++ ) {
		uls.item(i).style['display'] = 'none';
	}
}