function check_form()
  {
    valid = false;
    form = document.forms[0];
	if(form.nom.value=='')
      alert("Veuillez indiquer votre nom");
	else if(form.prenom.value=='')
      alert("Veuillez indiquer votre prenom");
	else if(form.mail1.value=='')
      alert("Veuillez indiquer votre e-mail");
    else if(form.mail1.value.indexOf('www')>=0||form.mail1.value.indexOf('@')<0||form.mail1.value.indexOf('.')<0)
      alert("Veuillez indiquer correctement votre e-mail");
	else document.formulaire.submit();
  }

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

<!--
function getAppVersion() {
  appname= navigator.appName;
  appversion = navigator.appVersion;
  majorver = appversion.substring(0, 1); 
  if ( (appname == "Netscape") && ( majorver >= 3 ) ) return 1;
  if ( (appname == "Microsoft Internet Explorer") && (majorver >= 4) ) return 1; return 0;}

if (document.images) {
  var img1 = new Image() ; img1.src = "img/acc_bout01.gif"
  var img2 = new Image() ; img2.src = "img/acc_bout01_f2.gif"
  var img3 = new Image() ; img3.src = "img/acc_bout02.gif"
  var img4 = new Image() ; img4.src = "img/acc_bout02_f2.gif"
  var img5 = new Image() ; img5.src = "img/acc_bout03.gif"
  var img6 = new Image() ; img6.src = "img/acc_bout03_f2.gif"
  var img7 = new Image() ; img7.src = "img/acc_bout04_new.gif"
  var img8 = new Image() ; img8.src = "img/acc_bout04_new_f2.gif"
  var img9 = new Image() ; img9.src = "img/acc_bout05.gif"
  var img10 = new Image() ; img10.src = "img/acc_bout05_f2.gif"
  
  var img11 = new Image() ; img11.src = "img/bout01.gif"
  var img12 = new Image() ; img12.src = "img/bout01_f2.gif"
  var img13 = new Image() ; img13.src = "img/bout02.gif"
  var img14 = new Image() ; img14.src = "img/bout02_f2.gif"
  var img15 = new Image() ; img15.src = "img/bout03.gif"
  var img16 = new Image() ; img16.src = "img/bout03_f2.gif"
  var img17 = new Image() ; img17.src = "img/bout04_new.gif"
  var img18 = new Image() ; img18.src = "img/bout04_new_f2.gif"
  var img19 = new Image() ; img19.src = "img/bout05.gif"
  var img20 = new Image() ; img20.src = "img/bout05_f2.gif"
}
function flip(imgName,imgVar) {
  document[imgName].src = eval(imgVar);
  return true;
}
function credits(page,largeur,hauteur,options)
{
var top=(screen.height-hauteur)/2;
var left=(screen.width-largeur)/2;
window.open(page,"","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
}
//-->