For the hundreds of thousands of Web enthusiasts who made their first foray into programming with the simple tagging language of HTML, JavaScript is the next step. JavaScript is a programming language designed to be used in conjunction with HTML, making HTML more powerful and interactive. It is now fully supported in Netscape Navigator 3. With JavaScript, Web page creators without deep technical experience can embed commands into their HTML pages that call up pre-cooked Java animations, add clocks and other time-based features , allow web pages to ask questions and gather information from visitors to the page, and provide other simple controls. While other JavaScript books are intended for experienced programmers, this one is for the vast majority of HTML coders who are less technically sophisticated but still would like to get their feet wet.