function VerificationEmail(elm)
{
if (elm.value.indexOf("@") != "-1" &&
    elm.value.indexOf(".") != "-1" &&
    elm.value != "")
    return true;
return false;
}

function verifForm_contact(formContact){
	if( document.getElementById("formContact").nom.value == "")
   {
   alert('Your name please!');
   }
	else if (VerificationEmail(document.getElementById("formContact").emetteur) == false)
    {
	    alert("Check your mail please");
	    document.formContact.emetteur.focus();
	    return false;
	return true;
	}
  else if( document.getElementById("formContact").sujet.value == "")
   {
   alert('Your subject is empty !');
   }
   else if( document.getElementById("formContact").message.value == "")
   {
   alert('Your message is empty !');
   }
  else
  document.getElementById("formContact").submit();
  }