JavaScript is a scripting language. Javascript was first known as LiveScript, but later Netscape changed it to JavaScript. It is the most popular scripting language and used on Internet, also it works with all the web browser. JavaScript is mostly used to make the webpage interactive and provides online programs. It is mostly used to validate HTML pages. This lead most attractive and dynamic HTML pages. It used to enhance the appearance of the web sites through the different technique like the pup-up window, rollover images, automatically change the date on a web page, etc. Also, it is used for processing analysis tasks such as form validation and browser checking. JavaScript used to run on the client side of the Web. JavaScript can function as both a procedural and object-oriented programming language. It can be embedded in HTML page and interpreted by the web browser.

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