The more complicated answer is, which browser are you using? JavaScript is a programming language in development. Right now the only JavaScript browsers are the Netscape family of browsers. But when you include the different platforms and different software releases, there are literally dozens of different versions of Netscape. Each version handles JavaScript a little differently, each has its own bugs, and each has its own improvements over prior releases. Even browsers with the same version number but designed for different operating systems will act differently. Add into this the fact that soon (in the next few weeks?) JavaScript browsers will be released by other companies (notably Microsoft, of course), and you have yet more browsers to deal with. We know that some of our scripts do not work with some browsers thanks to a number of bugs in those browsers. You can improve the chance that the scripts will work for you by making sure that you are working with the very latest version of Netscape. If you are really interested in learning JavaScript, we suggest that you get two copies of Netscape; get the most recent "released" version for everyday use, and get the most recent "beta" version for learning JavaScript. Is JavaScript Turned On? Another thing to check...is JavaScript enabled in your browser? The Netscape Navigator browsers allow you to turn JavaScript on and off. Open Options|Security Preferences to find the check boxes used to turn JavaScript on and off (if you can't find them there, try Options|Network Preferences and click on the Language tab).