Replace a form's textarea field(s) with a custom one that supports WYSIWYG formatting with this Rich Text Editor script. It allows the user to easily format the entered content, such as make it bold, change its size, colors etc.

Use this JavaScript to check the extension of a file.

Calculate and display the number of characters within a TEXTAREA with this JavaScript. Useful, for example, in helping your visitors manually keep their input length in check.

Use the form to try different settings. When you are happy with the results, paste the wizard generated code from the textbox at the bottom of this form into your page. When making color choices, use CSS approved color names or HEX color values (eg: #FFFFFF for white).

This script allows you to type directly on the document without the use of text boxes. I'm not sure how useful this is, but it's kinda neat.

This JavaScript accepts a number or string and formats it like U.S. currency. Adds the dollar sign, rounds to two places past the decimal, adds place holding zeros, and commas where appropriate. Occurs when the user clicks the button or when they finish entering the money amount (and click into the next field).

Let your visitors change the style sheet on your Web site. This JavaScript will let your visitors choose between five style sheets, which you can create yourself or use the ones included.

Determine if a credit card number could be valid before submitting it for real-time online authentication. Based on ANSI X4.13, the LUHN formula, aka the Mod 10 algorithm is used to validate accurate credit card numbers. Heavily commented.

Add a quiz to your Web page without using a server-side script. Easy to set-up. Questions and answers are stored in a multi-dimensional array format in an external file. The quiz is marked in real time, and once answered, questions are set to read-only. A summary of the users score is alerted at the end.

Another script to create a color picker.