If you have a new window open up on your home page, it opens every time your visitors come back to that page. This is rude as well as very annoying thing to force onto your visitors. But, using cookies, this JavaScript can determine if the visitor has been here before, and only open a new window on their first visit to the page. The next time they come back, the script will read the cookie, identify them as a repeat visitor, and NOT open the window again. Neat!

Ohm's Law calculator for electronics enthusiasts. Calculates Voltage, Current, Resistance, and Power.

JavaScript can help you figure the circumference of a circle when you enter the radius.

Use this JavaScript to calculate your BMI (Body Mass Index). Measurements are computed using the metric system. A perfect addition for a health Web site.

This JavaScript can create a contacter to rate, rank, contact... a website.

This page shows how to add DHTML animation to a page in a way that's compatible with older browsers, and works in both Netscape and Internet Explorer versions 4.x.

Use this JavaScript to create the up-scrolling news message in your website.

This JavaScript code creates a message box and shows an alert after the page gets downloaded. Use the test cases to invoke methods of the message box directly.

Display a few words in a form field and when focus is given to the field, the words will disappear. Great for providing instructions in a small space.

This script will open a window which you can't close it. Think carefully before click.