// 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('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';    
		}
	}