var http_request = false;
   function makePOSTRequest(url, parameters, resp) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = function() {alertContents(resp);}
	  http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }
   function alertContents(resp) {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            result = http_request.responseText;
			if(result.indexOf('<script>')!=-1)
				{
				result_to_evaluate = result.substring(result.indexOf('<script>'), result.length);
				balise1=new RegExp("<script>", "i");
				balise2=new RegExp("</script>", "i");
				result_to_evaluate = result_to_evaluate.replace(balise1, "");
				result_to_evaluate = result_to_evaluate.replace(balise2, "");
				
				//alert(result_to_evaluate);
				eval(result_to_evaluate);
				} 
			document.getElementById(resp).innerHTML = result;            
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
function submit_newsletter(obj, obj_name, div_return)
{
	if(is_empty(document.getElementById(obj_name).value)==false)
	{
		alert('L\'adresse email pour vous abonner \340 la newsletter est manquante');
		document.getElementById(obj_name).focus();
		return false;
	}
	else
	{
		if(!emailOK(document.getElementById(obj_name).value))
		{
			alert('L\'adresse email est invalide');
			document.getElementById(obj_name).focus();
			document.getElementById(obj_name).select();	
			return false;
		}
		else
		{
		  var poststr = "email=" + encodeURI( document.getElementById(obj_name).value ) ;
		  makePOSTRequest('inc/phpcalledbyajax/subscribe_newsletter.php', poststr, div_return);
		  return true;
   		}
	}
}