The page contains a link that can be followed only by browsers that support JavaScripts.

Replace the link that directly starts the script with other ways to start it, such as defining a button, separately defining the script (remember also the NOSCRIPT element), and binding an event like onKeyPress on the button to the script.

Links that activate scripts can only be followed by browsers capable of executing JavaScript. Not all browsers can do that. Examples include textual browsers like Lynx, browsers coupled with screen readers, and browsers for PDAs or cellular phones. A user with such a browser would not be able to navigate the page. Even if you provide other links or buttons to reach the destination, the user would still experience a broken link, thus increasing user frustration and confusion.