var xmlhttp = false;
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else if (window.ActiveXObject)
  {
  // code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
else
  {
  alert("Your browser does not support XMLHTTP!");
  }


function login() {

var email = encodeURI(document.getElementById('username').value);
var psw = encodeURI(document.getElementById('password').value);

// Pass the login variables like URL variable
xmlhttp.open('get', 'login.action.php?email='+email+'&psw='+psw);
xmlhttp.onreadystatechange = loginReply;
xmlhttp.send(null);
}
function loginReply() {
if(xmlhttp.readyState == 4){ 
var response = xmlhttp.responseText;
	//alert(response);

if(response == 0 || response == "error1" || response == "error2"){
// if login fails
	if(response == "error1" )
		document.getElementById('error').innerHTML = 'Mot de passe et/ou adresse de courriel non valide';

	if(response == "error2" )
		document.getElementById('error').innerHTML = 'Vous n’êtes pas inscrit comme utilisateur';

// else if login is ok show a message: "Welcome + the user name".
} else {
//document.getElementById('loggedIn').innerHTML = 'Welcome '+response;
window.location.href=window.location.href;
}
}
}