function verifMails(champ){

	var email = document.form.email.value;

	if (verifyMail(email) == false)    {
	        alert("Merci de corriger l'email.");
	        document.form.email.focus();
	        return false;
	}
}

function verifyMail(email){
  if (email == "")  {
	return false;
  }  else {
	    var reg = /^[a-z0-9._-]+@[a-z0-9.-]{2,}[.][a-z]{2,4}$/;
	    if (reg.exec(email) != null){
			return true;
	    }else {
			return false;
	    }
  }
}

function visibilite(thingId)
{
var targetElement;

targetElement = document.getElementById(thingId) ;

if (document.getElementById('newsletter').checked == true || document.getElementById('autre_lj').checked == true || document.getElementById('autre_partenaires').checked == true)
   targetElement.style.display = "" ;
else
  targetElement.style.display = "none";


}