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What is Javascript?

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Author: Dan

Javascript

JavaScript allows your web page to 'think'. Although many server-side scripting programs (such as PHP, JPS, ASP, or ColdFusion) have the ability to perform such functions, JavaScript can perform these functions within the client web browser. Javascript and Cookies must be enabled so we can message you correctly. Please enable javascript and cookies in your browser for the duration of your Java Installation and verification. JavaScript has a huge number of methods and functions available. The cheat sheet lists these in various sections.

JavaScript MD5 provides basic protection of passwords, for sites that do not use SSL. JavaScript's popularity is due entirely to its role as the scripting language of the WWW. JavaScript be inserted into a web page to add functionality. JavaScript is often confused with the Java programming language, but they are not the same.

Javascript adds a new dimension, the "how should this element behave" . JavaScript 1.2 and later has built-in support for regular expressions. MSIE 4 and later, Netscape 4 and later, all versions of Firefox, and most other modern web browsers support JavaScript 1.2. JavaScript is a programming language that can be included on web pages to make them more interactive. You can use it to check or modify the contents of forms, change images, open new windows and write dynamic page content.

JavaScript provides a full set of operators that can be used for this purpose. You may even find that some operations involving bit manipulation may help you to significantly speed up some of your processing. JavaScript itself, as a format, is free, and use of JavaScript in a web site is not necessarily bad. However, as we've seen above, it also isn't necessarily ok. JavaScripts are integrated into the browsing environment, which means they can get information about the browser and HTML page, and modify this information, thus changing how things are presented on your screen. This access to information gives JavaScript great power to modify the browsing experience.

JavaScript has the ability to pop up dialog boxes, open new browser windows and display messages to the user. These abilities can be used to provide descriptions about a page when it is loaded or when the user selects an object. JavaScript can be used in other contexts than a Web browser. Netscape created server-side JavaScript as a CGI-language that can do roughly the same as Perl or ASP. JavaScript can function as both a procedural and an object oriented language . Objects are created programmatically in JavaScript, by attaching methods and properties to otherwise empty objects at run time , as opposed to the syntactic class definitions common in compiled languages like C++ and Java.

JavaScript contains a few functions that are not part of objects. These functions are generally for variable type conversion to a specific type along with support of some dialog boxes. Javascript can also be used in a number of ways to spice up your page.

Javascript can interact with HTML source code , enabling Web authors to spice up their sites with dynamic content. JavaScript is endorsed by a number of software companies and is an open language that anyone can use without purchasing a license . Java is a lot more powerful, more complex. Java belongs in the same category of languages as C, C++, and other very complex languages.


   
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