This JavaScript uses regular expressions to check that a string contains a valid email address. Note that it won't catch all invalid emails, like most similar scripts. However, for most intents and purposes, this JavaScript should serve its purpose well, by rejecting common email typos while leaving room for obscure yet valid emails to pass.

If you're looking for a 216 web safe color chart, you've come to the right place. However, before reviewing the chart, you may be interested in learning a little bit about the 216 web safe colors. Netscape specified 216 colors that have precedence in web browsers based on the 256 colors displayed within an 8-bit system. As 40 colors displayed differently between PCs and MACs, they were eliminated. These 216 colors, known as web safe colors, are recognized by all web browsers and operating systems, which means these colors will look about the same within any browser.

Customize Dropdown Menu is designed to display some choices, as: languages, countries, themes,... but it's differrent from original version in browsers. This tool combine CSS and JavaScript to create a dropdown you can add image to tilte, every choice.

Version 2: check if JavaScript is disabled, then add normal dropdown menu

Let's try dropdown below and feel differences.
Tested: IE 7, Opera 9, Firefox 2, Netscape 8.

Hover over the wheel to view colors. Click to choose a web-smart color. Reload to clear.

This JavaScript will help you calculate your training heart rate. That figure is used to determine the target zone for aerobic training.

If you need to give a speech or read a script for a podcast, you can use this JavaScript to run your own teleprompter.
By clicking on the text or pressing return, you can toggle the scrolling of the text.

The functionality is quite basic. A <div> containing the text is constrained to the dimensions of the browser window. Then, by clicking on the text or pressing return, you can toggle the scrolling of the text. The speed of the scrolling can be increased by pressing ] and decreased by pressing [.

How would you like a Search Engine for YOUR site? This script does exactly that. Copy the codes to your site, enter the listings information, and you've got your own site search engine!

Use this JavaScript to easily change the order of options in a select box. You can see the order change as it happens in the "New Order" box. (The input can be hidden and used to change the order on the server side.)

Preview your code live, as you enter it. Supports most HTML/CSS tags. Excellent for previewing Web site designs.

Make your rollovers more noticeable! This JavaScript colors your clickable links on rollover.