JavaScript and AJAX for Mainframe programmers

Now a days many applications are going online. Lot of websites are creating to be more informative for users. As a mainframe programmer, learning JavaScript will help you understand how latest technologies working. You can do career transition.

JavaScript and AJAX do not stand on their own. They only have meaning in the context of Web pages, so they rely on various Web technologies. If you want to build a JavaScript application, you’ll need several other technologies, too.

HTML: HTML (HyperText Markup Language) is the basic markup language that describes Web pages. It’s a relatively simple technique for building Web sites that requires nothing but a plain text editor.
XHTML: XHTML is often considered the successor to HTML. Because it doesn’t allow certain kinds of tags, XHTML is actually a smaller language that’s a bit easier to use. Typically XHTML pages are more dependent on CSS than HTML, as many of the HTML tags are replaced with CSS tools.

Related: Read how you can write a JAVA program in Mainframe

CSS: CSS (Cascading Style Sheets) is a way to add specific style information to an HTML or XHTML page. HTML and XHTML provide the general framework, and CSS describes the color and layout.
JavaScript: JavaScript is a programming language embedded in all modern Web browsers. It’s specially designed to interact with Web pages; you can use it to extract information from parts of a page, and to manipulate the page in real time.
AJAX: (Asynchronous JavaScript And XML) is a technique that allows JavaScript to communicate more directly with the Web server. It creates an interesting new relationship between the Web browser and the Web server.

PHP: (PHP Hypertext Preprocessor) is one of several important languages for working on a Web server. The PHP language can do things that JavaScript cannot do. AJAX is frequently used to connect JavaScript applications to PHP programs. You get a brief introduction to PHP in Chapter 14.
Java: Java is a language that’s entirely different from JavaScript (despite the similar names). Although Java is useful on both the client and server sides of the client-server relationship.