function Valider(formcont)
{

  if (formcont.nom.value == "")
  {
    alert("Please specify your name.");
    formcont.nom.focus();
    return (false);
  }
if (formcont.ville.value == "")
  {
    alert("Please specify your city.");
    formcont.ville.focus();
    return (false);
  }
if (formcont.tel.value == "")
  {
    alert("Please specify your phone number.");
    formcont.tel.focus();
    return (false);
  }
txt=document.formcont.email.value;
  if (txt.indexOf("@")<3)
  {
   alert("Your email is not a valid Email Address.\nPlease specify a valid Email Address.");
    formcont.email.focus();
    return (false);
  }

  if (txt.indexOf(".",txt.indexOf("@"))<6)
  {
   alert("Your email is not a valid Email Address.\nPlease specify a valid Email Address.");
   formcont.email.focus();
    return (false);
  }
 return (true);
}