This JavaScript Boids effect is a simulation of flocking/schooling behavior (e.g. birds, fish). A very helpful JavaScript code to practice yourself.

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.

This small JavaScript file is used for embedding Adobe Flash content. The script can detect the Flash plug-in in all major Web browsers (on Mac and PC) and is designed to make embedding Flash movies as easy as possible. It is also very search engine friendly, degrades gracefully, can be used in valid HTML and XHTML 1.0 documents, and is forward compatible, so it should work for years to come.

A code box where users can edit code and preview their results all on the same page. A great way to offer your code snippets to your visitors.

Automatically highlight word words on a page when that page was reached by a search engine. If you search, for example, Google for some words, and then follow a JavaScript link from the search results to a searchhi enabled page, the words you searched for will be highlighted on that page.

This JavaScript allows someone to choose a file on their hard drive and open it. Now cross-browser compatible.

Commonly, everybody used to use a programming language in server to calculate time to load page. However, only with JavaScript and little creativeness, you can also calculate time to load your pages. There are two step to set up this JavaScript on your web pages. In fact, this JavaScript only calculate time to display your pages in client side. Therefore, time to load page depend on speed of processor. Of course, if you place two script nearly, time to load equal 0.

This is a different script to change color from HEX code to DEC code.

Do you ever wonder how much you must pay for fuel/gas in a year? Use this simple gas cost calculator to find out how much you spend or calculate fuel/gas costs, cost average monthly and annually. In addition, this calculator will also compute the miles per gallon (MPG) for your vehicle.

Use this JavaScript to make your own quiz.