function check_contact_form(formObj)
{

 var re = new RegExp("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]{2,})+$");
 var mail;
 mail=formObj.form[mail].value;

 if(mail.search(re) != 0 )
   {
   alert("mail invalide !");
   mail.focus();
   return false;
   }
 else
  {
  return true;
  }
/*
	var infos;
	infos+=navigator.userAgent;
	infos+="\n--  langage :"
	infos+=navigator.language;
	document.form_msg.msg_infos.value=infos;
*/
}

//masquer - afficher des div
function visibilite(thingId,linkObj)
{
	
	var targetElement;
	targetElement = document.getElementById(thingId) ;
	if (targetElement.style.display == "none")
		{
		targetElement.style.display = "" ;

		}
	else
		{
		targetElement.style.display = "none" ;
		}
	
	for (var i = 0; i < document.forms.length; i++) {
		if((document.forms[i].id != "") && (document.forms[i].id != thingId)){
		xform=document.getElementById(document.forms[i].id)
		xform.style.display = "none" ;

		}
	}
}