View Full Version : No Page Load Sign In Script

03-13-2012, 02:43 AM
Hey everybody,

I've been trying to create a simple sign in script where a user can sign into a website (there's no back-end, just testing communication) without having a new page to load. I've gotten through most of the problems with it but unfortunately the processes load in this order:

1) Main login page, user submits form to a hidden iframe
2) Javascript loads "success.txt" on form "onsubmit"
3) submit.php processes form and saves results in "success.txt"

And of course, I'd like it to be in this order:

1) Main login page
2) user submits form > submit.php
3) back on main page, Javascript loads "success.txt"

For some reference, here's some of the code I'm using:

success.txt: blank txt file

Main login page:

<form action="signup.php" method="post" target="send" id="sign_up" onsubmit="validate(); ">
<p>E-mail: <input name="email" /></p>
<p>Password: <input name="password" type="password" /></p>
<p><input type="submit" onsubmit="" value="Sign Up" /></p>
<iframe name="send" style="position: absolute; left: -1000px; "></iframe>

Javascript for login page:

var validate = function() {
var xml = xml_request();
xml.open("GET", "success.txt", true);
xml.onreadystatechange = function() {
if (xml.readyState == 4 && xml.status == 200) {
var ses = xml.responseText;
if (ses == "1") alert('logged in');
else alert('not');
*Note: my xml_request() function is a standard initialization of the XML HttpRequest object (no worries here).


if (count($_POST) > 0) {
$email = $_POST["email"]; $password = $_POST["password"];
$error = 0;
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) $error = 1;
if (strlen($password) < 6) $error = 1;
$val = $error ? 0 : 1;
session_start(); $_SESSION["logged"] = $val;
$h = fopen("success.txt", "w");
fwrite($h, $val); fclose($h);
*Note: the $_SESSION is used for other pages when page navigation will take place.

This is my first stab at this type of thing, so I guess there's a lot wrong here with my code order, priority, etc. All thoughts are gladly welcomed!