tailieunhanh - Javascript bible_ Chapter 1

Tài liệu tham khảo ngôn ngữ lập trình_ Javascript bible | JavaScript s Role in the World Wide Web For the many individuals responsible today for content on the World Wide Web it wasn t long ago that terms such as HTML Hypertext Markup Language and URL Universal Resource Locator seemed like words from a foreign language. Growth in activity on the Web producing content and surfing it has been nothing short of phenomenal. Some may even call the hyperactivity scary. I could quote the estimates of the number of Web sites available on the Internet but that count would be woefully outdated before these words ever reached a printing press. Developers of Web software technologies are now in a desperate race to catch up with the enthusiasm that people have for the Internet and for the Web in particular. Web site authors are constantly seeking tools that will make their sites engaging if not cool with the least amount of effort. This is particularly true when the task is in the hands of people more comfortable with writing graphic design and page layout than with hard-core programming. Not every Webmaster has legions of experienced programmers on hand to whip up some special custom enhancement for the site. Nor does every Web author have control over the Web server that physically houses the collection of HTML and graphics files. JavaScript brings programming power within reach of anyone familiar with HTML even when the server is a black box at the other end of a telephone line. Competition on the Web Web page publishers revel in logging as many visits to their sites as possible. Regardless of the questionable accuracy of Web page hit counts a site consistently logging 10 000 dubious hits per week is clearly far more popular than one with 1 000 dubious hits per week. Even if the precise number is unknown relative popularity is a valuable measure. CHAPTER In This Chapter How JavaScript blends with other Web authoring technologies The history of JavaScript What kinds of Jobs you should and should not entrust to JavaScript 4 Part 1 .