var http_request = false;
function makePOSTRequest(url, parameters) {
  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;
  }
  //alert(parameters);
  http_request.onreadystatechange = subscribeme;
  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);
}

String.prototype.trim = function (){
	return this.replace(/^\s*/, "").replace(/\s*$/, "");
}


function subscribeme(){
  if (http_request.readyState == 4){
	 if (http_request.status == 200){
		result = http_request.responseText;
		result = result.trim();
		if(result == "no"){
			document.getElementById('msgsub').innerHTML = 'L\'adresse email saisie ne semble pas valide';   
		}else{
			document.getElementById('msgsub').innerHTML = '<span id="sub_ok">'+result+'</span>';   
			document.getElementById('newsletter_subscribe').style.display = 'none';
		}
	 } 
	 else{
		alert('Problème rencontré lors de l\'envoi.');
	 }
  }
}

function subscribe_news(url){
	var _e = document.getElementById('mailsub').value;
	if(_e != '' && (_e.indexOf('@',0) == -1 || _e.indexOf('.',0) == -1))
		document.getElementById('msgsub').innerHTML = '&nbsp; <span style="color: red;">Merci de saisir une adresse email valide.</span>';
	else if(_e == '')
		document.getElementById('msgsub').innerHTML = '&nbsp; <span style="color: red;">Merci de renseigner une adresse email.</span>';
	else{
		var post = "m=" + encodeURI(_e);			
		makePOSTRequest(url+'subscribe.php', post);
	}
}