It's a sad but true fact that not all browsers support JavaScript

[adakist]

It's a sad but true fact that not all browsers support JavaScript. Readers using popular browsers such as NCSA Mosaic will not benefit from your JavaScript expertise.

[brumbino]

.Unless you want to alienate those readers, you need to be sensitive to the needs of the Netscape-deficient. Two major errors to avoid are littering the screen with JavaScript code and leaving a blank page for the reader to ponder.