mirror of
https://gitlab.com/harald.mueller/aktuelle.kurse.git
synced 2024-11-24 18:51:56 +01:00
134 lines
4.8 KiB
HTML
134 lines
4.8 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<script type="text/javascript" src="ajax_form.js"></script>
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<style>
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.error {
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display: none;
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color: #a00000;
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font-weight: bold;
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}
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#progress {
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visibility: hidden;
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color: #00a000;
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}
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</style>
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<script type="text/javascript">
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function HideAllErrorFields () {
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for (var i = 1; i <= 4; i++) {
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var field = document.getElementById ("error" + i);
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field.style.display = "none";
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}
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}
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function ShowErrorFields (idsStr) {
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var ids = idsStr.split (",");
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for (var i = 0; i < ids.length; i++) {
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var field = document.getElementById ("error" + ids[i]);
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if (field) {
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field.style.display = "block";
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}
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}
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}
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var registering = false;
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function OnReadyStateChanged (httpRequest, form) {
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if (httpRequest.readyState == 0 || httpRequest.readyState == 4) {
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registering = false;
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StopAnim ();
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// prevent memory leaks
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httpRequest.onreadystatechange = null;
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if (IsRequestSuccessful (httpRequest)) { // defined in ajax_form.js
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if (httpRequest.responseText === "ok") { // registration is successful
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alert ("Thank you for registering");
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/*
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// if redirection is required
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location.href = "/index.php";
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*/
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}
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else { // some fields are invalid
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ShowErrorFields (httpRequest.responseText);
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}
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}
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else {
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alert ("An error occurred while registering. Please try it again.");
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}
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}
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}
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function AjaxSend (form, url, method) {
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// avoid resend data while registering
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if (registering) {
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return;
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}
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// hide all error fields
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HideAllErrorFields ();
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// get message data
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var data = GetMessageBody (form); // defined in ajax_form.js
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// send the request
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var httpRequest = CreateRequestObj (); // defined in ajax_form.js
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// try..catch is required if working offline
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try {
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httpRequest.open (method, url, true); // asynchron
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httpRequest.onreadystatechange = function () {OnReadyStateChanged (httpRequest, form)};
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httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
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httpRequest.send (data);
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}
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catch (e) {
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alert ("Cannot connect to the server!");
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return;
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}
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registering = true;
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StartAnim ();
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}
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// blinking text
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var animTimerId = 0;
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function StartAnim () {
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var progress = document.getElementById ("progress");
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progress.style.visibility = "visible";
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animTimerId = setInterval (RegAnim, 100);
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}
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function RegAnim () {
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var progress = document.getElementById ("progress");
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progress.style.visibility = (progress.style.visibility == "visible") ? "hidden" : "visible";
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}
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function StopAnim () {
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var progress = document.getElementById ("progress");
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progress.style.visibility = "hidden";
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clearInterval (animTimerId);
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}
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</script>
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</head>
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<body>
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This is a sample registration form.
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The username must be between 2 and 20 characters, the password must be between 6 and 20 characters.
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A user named Dottoro is already registered.
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<br />
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Try to register both valid and invalid values!
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<br /><br />
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<form onsubmit="AjaxSend (this, 'register_delay.php', 'post'); return false;">
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User Name: <input type="text" name="userName" />
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<div class="error" id="error1">Must be between 2 and 20 characters.</div>
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<div class="error" id="error2">A user already exists with the same name.</div>
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<br /><br />
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Password: <input type="password" name="password" />
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<div class="error" id="error3">Must be between 6 and 20 characters.</div>
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<br /><br />
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Repeat Password: <input type="password" name="repassword" />
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<div class="error" id="error4">Must be the same as the password.</div>
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<br /><br />
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<input type="submit" value="Register" />
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<div id="progress">Registering</div>
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</form>
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</body>
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</html>
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