function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//-->


function ouvrir(numlayer){
if (document.getElementById) { //IE5 ou Netscape 6 
document.getElementById(numlayer).style.visibility="visible";
}
if (document.layers) { //NS4.X seul
document.layers[numlayer].visibility="visible"
}
}


function fermer(numlayer){
if (document.getElementById) { //IE5 ou Netscape 6 
document.getElementById(numlayer).style.visibility="hidden";
}
if (document.layers) { //NS4.X seul
document.layers[numlayer].visibility="hidden"
}
}

//------------------------------------------------------------------------- afficher les menus

function afficher_menus(menu) {
			
			var xhr_object = null;
			if(window.XMLHttpRequest) // Firefox
			   xhr_object = new XMLHttpRequest();
			else if(window.ActiveXObject) // Internet Explorer
			   xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
			else { // XMLHttpRequest non supporté par le navigateur
			   alert('Votre navigateur ne supporte pas les objets XMLHTTPRequest...');
			   return;
			}
			var method   = "POST";
			var filename = "gestion/afficher_menus.php";
			var data   = null;
			var tmp = null;
			if(menu != "")
			   data = "menu="+menu;
				xhr_object.open(method, filename, true);
				
						xhr_object.onreadystatechange = function() {
							if(xhr_object.readyState == 4) {
							var tmp = xhr_object.responseText.split(":");
							var reponse=tmp[0];
							var message=tmp[1];
								if(typeof(tmp[1]) != "undefined") {
								 if(reponse=="1"){
									    var oldHTML = document.getElementById('menus').innerHTML;
										var newHTML = message;
										document.getElementById('menus').innerHTML = newHTML;
										
										fermer('cadre_marron');
										fermer('texte_cadre_marron');
										ouvrir('cadre_menus');
										ouvrir('titre_menus');
										ouvrir('texte_menus');
										ouvrir('fermer_menus');
										
								  } else {
										alert('erreur retour variable afficher_menu.php');
									}
								}
							}
						}
				
				if(method == "POST")
				   xhr_object.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
				xhr_object.send(data);
	}
	
//------------------------------------------------------------------------- afficher presentation

function afficher_presentation() {
							
		fermer('cadre_menus');
		fermer('titre_menus');
		fermer('texte_menus');
		fermer('fermer_menus');
		
		ouvrir('cadre_marron');
		ouvrir('texte_cadre_marron');
										
	}

	
//------------------------------------------------------------------------- mouvement vertical
	
var Timer;
var Pas = 3;
function moveLayer(Sens) {
	Objet=document.getElementById("menus");
    if(parseInt(Objet.style.top) + (Pas*Sens)>0)  {
		clearTimeout(Timer);
	}
	else if(parseInt(Objet.style.top) + (Pas*Sens)<-(Objet.offsetHeight-document.getElementById("support").offsetHeight)) {
		clearTimeout(Timer);
	}
    else {
        Objet.style.top = (parseInt(Objet.style.top) + (Pas*Sens)) + "px";
	}
	Timer = setTimeout("moveLayer(" + Sens + ");", 30);
}