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_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_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_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];
  }
}

/*AFICHAGE DE ZONE CACHEE*/
function montrer_reponse(reponse,index,nb_reponse) {
//on cache toute les réponses (pour s'assurer que 'lieu-reponse' est vide)
  for(i=1;i<nb_reponse;i++)
    document.getElementById(reponse+i).style.display = "none";
    
  if (reponse=="ppub_image")
    document.getElementById("ppub_image0").style.display = "none";
  //on montre la nouvelle réponse
  document.getElementById(reponse+index).style.display = "block";
}

/*GESTION D'ÉLÉMENT FORMULAIRE*/
function affCache(choix,saisie,nb_reponse) {
  if (document.getElementById(choix).checked)	{
    for(i=1;i<=nb_reponse;i++)
      document.getElementById(saisie+i).disabled = false;
	} else {
    for(i=1;i<=nb_reponse;i++)
      document.getElementById(saisie+i).disabled=true;
	}
}

/*GESTION DU MENU*/
function test() {
  document.getElementById('image2').style.color="#000";
  document.getElementById('image2').style.backgroundImage="URL('./img/montgolfiere-btn-selected.jpg')";
}
function testout() {
  document.getElementById('image2').style.color="#fff";
  document.getElementById('image2').style.backgroundImage="URL('./img/montgolfiere-btn.jpg')";
}

/*FORCE L'UTILISATEUR A SAISIR UNE VALEUR NUMÉRIQUE*/
function chiffres(event) {
    // Compatibilite IE / Firefox
    if(!event&&window.event) {
        event = window.event;
    }
    // IE
    if(event.keyCode < 48 || event.keyCode > 57) {
        event.returnValue = false;
        event.cancelBubble = true;
    }
    // DOM
    if((event.which < 48 || event.which > 57)&& event.which !=8 && event.which !=0) {
        event.preventDefault();
        event.stopPropagation();
    }
}