// JavaScript Document
/* ---------------------------- */
/* XMLHTTPRequest Enable */
/* ---------------------------- */
function createObject() {
  var request_type;
  var browser = navigator.appName;
  if(browser == "Microsoft Internet Explorer"){
    request_type = new ActiveXObject("Microsoft.XMLHTTP");
  }else{
    request_type = new XMLHttpRequest();
  }
  return request_type;
}

var http = createObject();

/* -------------------------- */
/* LOGIN */
/* -------------------------- */
/* Required: var nocache is a random number to add to request. This value solve an Internet Explorer cache issue */
var nocache = 0;
function login() {
  // Optional: Show a waiting message in the layer with ID ajax_response
  document.getElementById('login_response').innerHTML = "Loading..."
  // Required: verify that all fileds is not empty. Use encodeURI() to solve some issues about character encoding.
  var email = encodeURI(document.getElementById('emailLogin').value);
  var psw = encodeURI(document.getElementById('pswLogin').value);
  // Set te random number to add to URL request
  nocache = Math.random();
  // Pass the login variables like URL variable
  http.open('get', 'modules/login.php?email='+email+'&psw='+psw+'&nocache = '+nocache);
  http.onreadystatechange = loginReply;
  http.send(null);
}

function loginReply() {
  if(http.readyState == 4){
    var response = http.responseText;
//    alert(response);
    if(response == '0'){
    // if login fails
      document.getElementById('login_response').innerHTML = 'Login failed! Verify user and password';
    // else if login is ok show a message: "Welcome + the user name".
    } else {
      document.getElementById('login_response').innerHTML = 'Welcome '+response;
      document.getElementById('divForm').style.display = 'none';
    }
  }
}