Tagged with "javascript Archives - VileWorks"

Password un-masking:
Show them in clear text

Sep 30, 2009 by     21 Comments    Posted under: archives

Windows has a nice option labeled Show characters right below password input fields:

“Show characters” checkbox under a password field in Windows

Useit.com recommends it: It’s time to show most passwords in clear text as users type them. So without further ado, here’s what it looks like on the web: unmasking the password field This is the HTML code from the example:

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inFrame: Keep demos inside
the page with jQuery

Sep 18, 2009 by     30 Comments    Posted under: archives

Say I had some CSS or JavaScript techniques/effects I wanted to show in a blog post. Obviously it would have been uncomfortable for me to actually include the thing in the post (CSS needs to be in the head, JavaScript may conflict with other JavaScript, etc), so the best option would have been to just link to the file demonstrating the effect. Using inFrame the reader doesn’t have to go away from the blog post to view demo files… just add a class of inframe to each of these links. In the second Official jQuery Podcast Ralph Whitbeck, Elijah Manor and their guest Richard D. Worth go through what inFrame is and when/why it’s useful:

Audio MP3

Try it out: Click on the links to view/hide

Some random example from A List Apart: “CSS Sprites2″: regular link to the file

Slick animation menu (from nettuts): regular link to the file

Smooth Gallery, a mootools gallery: regular link to the file

The jQuery JavaScript

Of course, you have to include jQuery if you’re not using it already in the page. (more…)

PHP Screencast: Hidden Captcha

Sep 7, 2009 by     9 Comments    Posted under: archives

As I was saying in a past–not so documented–article, this is how the Hidden Captcha concept works:

Does the user have JavaScript enabled?

If yes, they’re okay — let’em comment, no annoying captcha required.

No? We’ve got a suspect. Read them their rights and serve them the ultimate “are you human?” test.

I made this 5 minute screencast to earn fame and fortune on Nettuts, but I’m also posting it here along with some textual comments. Figured I’d make it easier for you to copy/paste the whole 2 lines of JavaScript.

Here’s what you start with, the source code from this tutorial.

(Note: be sure to have the Arial font file called arial.ttf in the fonts folder–copy it from your System in there because their archive does not come with it).

This is the JavaScript/PHP I’m pasting in:

<script type="text/javascript">// <![CDATA[
  document.getElementsByName('code')[0].value = '<?php echo $string; ?>';
  document.getElementById('captcha').style.display = 'none';
// ]]></script>

Both lines of JavaScript work on elements from this chunk of HTML:

<div id="captcha">
  <img src="captcha.php" alt="" /><input type="text" name="code" /> Are you human?
</div>

The first line of JavaScript sets the correct value for the code text field.

And the second line of JavaScript sets display:none to the captcha div, thus hiding it from anyone with JavaScript enabled.

Hidden Captcha instead of Akismet?

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PHP Tutorial: Build a backend manager for Smooth Gallery

Oct 14, 2008 by     13 Comments    Posted under: archives

In this tutorial I’ll walk you through the steps involved in building a databaseless PHP admin section for Smooth Gallery.

When done, without much effort you should be able to adapt the code to fit any similar JavaScript image gallery(/slider/switcher/swapper… whatever).

So let’s take a look at it:

Smooth Gallery Manager

Smooth Gallery Manager

As mentioned on the manager page, the password is “demo” and you don’t have sweat about removing/adding/reordering images—the manager in the demo resets the file to an initial input each time a user logs in.

For faster testing: right click some photo from the internet, select copy image location and paste it in the Add New Item/Image location field (that’s the only required field). Then press Add. Then in the Edit Items part copy and paste image locations from one item to another and then update it.

You might want to download the gallery + manager before continuing:

zip Download Smooth Gallery Manager (1937 downloads) — Databaseless PHP admin pannel for Smooth Gallery.

After you do, open up manager.php and follow along. Only the more important parts ware discussed below, the rest is commented in the file.

So how come no databases?

It’s an image gallery, it’s not gonna have thousands of entries. There’s not much justification in creating a database for 5-20 items. We’ll keep it all in the HTML.

And this will give us a chance to work with a really neat tool: PHP Simple HTML DOM Parser. This HTML parser written in PHP5+ is going to save us a lot of work. And I think this won’t be the last you hear of it here on Vile Works.

1. The logic behind it, in plain English

We’re going to have a simple log in/log out functionality, we don’t want anyone who knows the manager’s URI to be able edit our gallery.

After the log in, two main options will be available: add new item and edit existing items. …And a log out link.

if logged in
	if received 'add item'
		add the item;
	display 'add item' form;
	if received 'update items'
		update all the items;
	display 'update items' form;
	display 'log out' link;
else
	display 'log in' form;

The conditioned actions “if received ‘add item’ -> add the item” and “if received ‘update items’ -> update the items” are placed in the code before their forms so that they will display a success or error message in the page just above the form that was submitted.

The “add new item” functionality will add a new item at the beginning of the gallery: the image along with its title, description and a link to another page.

The “update items” will allow us to:

  • change the items’ titles, descriptions, images and the URL the images link to
  • delete items
  • and to reorder the items

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Using captcha without displaying it

Oct 1, 2008 by     21 Comments    Posted under: archives

How I use captcha without making my users complete the barely readable word

Capthca sucks. For more information on how much captcha can suck see John Willis’ post Top 10 Worst Captchas.Bad Captcha
But at the same time it can be really annoying for webmasters to have their forms unprotected with all the spam bots running free out there.

What I wanted was to have the commenting feature protected against spam bots without having the innocent human users ruining their eyes on captcha like images, or complete any mathematical equation or any other additional question fields.

One very important difference between a spam bot and a human using a web browser is that the first can’t run JavaScript code. However, this isn’t a perfect criteria of selection, because there are humans browsing the web using browsers without JavaScript support (Opera Mini for mobile devices for example).

My ideea (and as I did some Google searches, I found out other people had similar ideas) was the followig algorithm:

Does the user have JavaScript enabled?
If yes, he’s ok. Let him comment.
No? He’s a suspect. Read him his rights and give him the ultimate “are you human?” test.

To do this I left the captcha system enabled and in place and wrote 2 extra lines of JavaScript that:

//complete the text field with the correct word from the image:
$('secretword').value='nospam';
//hide the div containing the captcha image and the text field:
$('captcha').style.display='none';

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