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<a href="http://blog.creonfx.com/javascript/mootools-vs-jquery-vs-prototype-vs-yui-vs-dojo-comparison-revised" rel="ugc">http://blog.creonfx.com/javascript/mootools-vs-jquery-vs-prototype-vs-yui-vs-dojo-comparison-revised</a><br />
<a href="http://tech.yes-co.nl/2009/08/25/jquery-versus-dojo-versus-yui/" rel="ugc">http://tech.yes-co.nl/2009/08/25/jquery-versus-dojo-versus-yui/</a><br />
<a href="http://dojotoolkit.org/reference-guide/quickstart/introduction/whydojo.html" rel="ugc">http://dojotoolkit.org/reference-guide/quickstart/introduction/whydojo.html</a><br />

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http://blog.creonfx.com/javascript/mootools-vs-jquery-vs-prototype-vs-yui-vs-dojo-comparison-revised [http://blog.creonfx.com/javascript/mootools-vs-jquery-vs-prototype-vs-yui-vs-dojo-comparison-revised]
http://tech.yes-co.nl/2009/08/25/jquery-versus-dojo-versus-yui/ [http://tech.yes-co.nl/2009/08/25/jquery-versus-dojo-versus-yui/]
http://dojotoolkit.org/reference-guide/quickstart/introduction/whydojo.html [http://dojotoolkit.org/reference-guide/quickstart/introduction/whydojo.html]


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I would like to know differences between jquery,dojo, extjs. What are advantages, disadvantages, uses of them. When, why, how we use them. thanks in advance.
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I would like to know differences between jquery,dojo, extjs. What are advantages, disadvantages, uses of them. When, why, how we use them. thanks in advance.

differences between jquery,dojo, extjs

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

Asynchronous JavaScript and XML (AJAX) is a group of interrelated Web development techniques used on the client-side to create asynchronous Web applications. With AJAX, web applications can send data to and retrieve from a server asynchronously (in the background) without interfering with the display and behavior of the existing page. HTML and CSS can be used in combination to mark up and style information. The Document Object Model (DOM) is accessed with JavaScript to dynamically display and allow interaction with the information presented.

AJAX

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.