var _httpRequest;
if (window.XMLHttpRequest) { 
	_httpRequest = new XMLHttpRequest();
} else if (window.ActiveXObject){
	_httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
/** 0,1,2,3,4,5 */
var _pages = new Array( '' , "jeuconcours.html","comite.html","billetterie.html","enattendant.html","prixFnacSNCF.php" );
var _menus = new Array( 'accueilMenu' , "jeuConcoursMenu","comiteSelectionMenu","billeterieMenu","enAttendantMenu","prixessentielMenu" );
function changePage(level) {
	//writeCSSMenu( level );
	if( _httpRequest == null ) return; // nothing to do
	var flashDiv = document.getElementById( "flashDiv" );
	var pageDiv = document.getElementById( "pageDiv" );	
	if( level == 0 ) {
		// display the hidden flash only	
		pageDiv.style.display = "none";
		flashDiv.style.visibility = "visible";
	}  else {
		var request = _pages[level];
		//alert( request );
		_httpRequest.open("POST", request, false);
		_httpRequest.send(null);		
		var el = document.getElementById( "pageDiv" );
		pageDiv.style.display = "block";
		flashDiv.style.visibility = "hidden";	
		el.innerHTML = _httpRequest.responseText;
	}
	// then update the menu:
	var menu = document.getElementById( "menu" );
	var items = menu.getElementsByTagName( "a" );
	var newSelectedMenuItem = null;
	for( var i=0;i<items.length;i++ ) {
		items[i].className = "";
		if( items[i].id == _menus[level] ) {
			newSelectedMenuItem = items[i];
		}
	}
	newSelectedMenuItem.className = "selected";
}

function noFlashAvailable() {
	var flashDiv = document.getElementById( "flashDiv" );	
	var html ="<div id='getFlash' style='position:relative;margin:120px auto;padding:20px;width:400px;background-color:#ddd4e7;height:98px'>";
	html += "<img src='images/fp.png' style='position:relative;float:left'/>";
	html += "<p style='position:relative;float:right;top:18px;width:260px;'>Pour visualiser le contenu de la page, ";
	html += "il est nécessaire de télécharger la version 9 du plugin flash";
	html += " disponible <a href='http://get.adobe.com/flashplayer/'>ici</a></p>";
	html += "</div>";
	flashDiv.innerHTML = html;
}