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!

Add footnotes to your Web pages without all the aggravation. This JavaScript will pull the notes from your text, add links to them, and format them at the bottom of the page. It will also add a JavaScript link back to the spot in the text where the note is referenced. Very easy to use.

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.)

Your visitors may not be familiar with style sheets for printing and don't see a 'print preview' in their browser. This script will provide them with a reliable print preview.

Use this JavaScript snippet to obtain the URL which referred the user to that page. Be aware that on some servers this may not work.

Sometimes you want a single hyperlink to lead to several pages and present a dynamic JavaScript menu when clicked. This is usually done through an intermediary page. This JavaScript will provide a dynamic JavaScript menu by creating an absolutely-positioned DIV tag on the fly, which will contain the list of links.

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

This JavaScript will allow you to limit the number of words and/or characters entered into a form. Easily customizable. Example script will limit input to either 80 characters or 16 words, whichever comes first.