function switchImage(imgName, imgSrc) {
  if (document.getElementById(imgName)){
    if (imgSrc != "none"){
      document.getElementById(imgName).src = imgSrc;
    }
  }
}

function ouvrirnewpage (page){
  window.open(page,'_blank','','','','',toolbar=1,location=1,directories=0,menuBar=1,'');
}

function situation(ville) {
  window.open('carte.php?ville='+ ville,'_blank','toolbar=0, location=0, directories=0, status=0, scrollbars=0, resizable=0, copyhistory=0, menuBar=0, width=451, height=424');
  return false;
}

function verif(){
  if (document.getElementById("nom").value.length == 0) {
    alert("Please give us your name"); 
    return false; 
  }

  adresse = document.getElementById("email").value;
  var place = adresse.indexOf("@",1);
  var point = adresse.indexOf(".",place+1);
  if ((place > -1)&&(adresse.length >2)&&(point > 1)){
    return true;
  }
  else{
    alert('Email not valid');
    return false;
  }
}