JavaScript is a nonproprietary scripting language that was designed by Netscape to extend the browser's functionality, increasing the aesthetics and friendliness of Web sites by adding author-specified user events to otherwise static pages. These would include mouse rollovers, slide shows, visitor counters, ad banners, interactive surveys, pop-up menus, typing marques, and much, much more.
ASP, or Active Server Pages, are another commonly used technology for data-enabling your Web site. ASP pages are executed "server-side," meaning that the Web server processes the information request and returns the dynamic data to the client-side (i.e. your Web browser).