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JavaScript


JavaScript is a side scripting language & it is embedded inside in html. The javaScript are written inside the script tag. The script tag is always written inside the header tag.

JavaScript was developed by Brendan Eich and introduced in the 1995 release of the Netscape 2.0. It was standardized by the European Computer Manufacturer's Association (ECMA) As ECMA Script. The ECMA Script defines the core of the javaScript language. Now a day most browsers support the third edition of the ECMA-262 standard.

The script tag contains a collection of function. All HyperText Markup Language(HTML) controls or generate javaScript event and all java code or .net code are written in the javaScript. When the event is raised then it calls the hander method that is declared inside the script tag.

In .net JavaScript is an essential part of Ajax. The JavaScript code in an Ajax application send the requests of the client to server and the code is processed by the server, but it does not wait for an answer. JavaScript can also work with the server response that come in the form of Extensible Markup Language(XML), instead of reloading the entire page when the server is finished with your request.

An important thing about javaScript is that once you have learned its usage in browser programming you can use it in other areas also. Microsoft's Internet Information server uses JavaScript to program server-side web page. Portable Document Format file also use Java script, even windows administration tasks can be automate by using JavaScript. Now a day a lot of companies are also offering Application Programming Interface(APIs) which feature JavaScript object and methods that you can use in your own page. In its long journey JavaScript has continuously grow in popularity and today it is supported by almost all the browsers and JavaScript make the web pages interactive.


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