Untitled

Authentication for Small Website, example?
$(document).ready(function(){
  $("#NAME-OF-SUBMIT-BUTTON").submit(function(){
    var username = $(this).find("#username");
    var password = $(this).find("#password");
    $("NAME-OF-DIV-FOR-RETURN").load('login.php', {['parameters']:,[username,password]},function(responseText){
      if(responseText == 'SUCCESSFUL-RESPONSE-TEXT'){
        $("#NAME-OF-FORM").html("Login Successful");
      }
    });
  });
});

session_start();

$_GLOBALS['users'] = array(
    //'username' => 'password'
    'robert' => 'my_pass'
);

function isAuthed()
{
    if(empty($_SESSION['logged_in']))
    {
        if(!empty($_REQUEST['username']) || !empty($_REQUEST['password']))
        {
            if(isset($_GLOBALS['users']) && is_array($_GLOBALS['users']))
            {
                if(isset($_GLOBALS['users'][$_REQUEST['username']]) && $_GLOBALS['users'][$_REQUEST['username']] === $_REQUEST['password'])
                {
                    $_SESSION['logged_in'] = true;
                    return true;
                }
            }
        }
    }else
    {
        return true;
    }
    return false;
}

if(!isAuthed())
{
    die('Your not authorized to see this page');
}

function validateLogin(user, pass, successCallback, errorCallback){
    $.get('/login', {user: user, pass:pass}, function(data){
        if(data.status == 'success'){
            successCallback();
        }else{
            errorCallback();
        }
    }
}