// JavaScript Document
  var xmlHttp1 = false;

  function inserer_newsletter(){
   var email=document.getElementById("newsletter_email").value;
   var re=/^[a-zA-Z0-9_-]+(\.)*[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/;

  if (!re.test(email)) {
  alert("Votre adresse email est incorrect");
   }

  else{
       try {
          xmlHttp1 = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (e) {
           try {
              xmlHttp1 = new ActiveXObject("Microsoft.XMLHTTP");
           } catch (e2) {
               xmlHttp1 = false;
             }
       }

       if (!xmlHttp1 && typeof(XMLHttpRequest) != 'undefined') {
            xmlHttp1 = new XMLHttpRequest();
       }
			 
			 var url="box/newsletter_ajax.php?newsletter_email="+email;     

       xmlHttp1.open("GET", url, true);
       xmlHttp1.onreadystatechange = updatepage;
       xmlHttp1.send(null);
			 }
		}
		
		function updatepage() {
        if (xmlHttp1.readyState == 4) {
           var response = xmlHttp1.responseText;
             document.getElementById('newsletter_email').value= response;
        }
    }