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check this link for some good discussion<br />
<a href="http://stackoverflow.com/questions/483073/getting-a-better-understanding-of-callback-functions-in-javascript" rel="ugc">http://stackoverflow.com/questions/483073/getting-a-better-understanding-of-callback-functions-in-javascript</a><br />
<br />
example that you posted is more of a delegation than callback.<br />
Callback is mostly used for asynchronous execution to make sure that there is some method waiting for execution when the original method returns back.<br />
<br />
For example, call back methods for ajax calls<br />

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check this link for some good discussion
http://stackoverflow.com/questions/483073/getting-a-better-understanding-of-callback-functions-in-javascript [http://stackoverflow.com/questions/483073/getting-a-better-understanding-of-callback-functions-in-javascript]

example that you posted is more of a delegation than callback.
Callback is mostly used for asynchronous execution to make sure that there is some method waiting for execution when the original method returns back.

For example, call back methods for ajax calls


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<div class="content wysiwyg-content">
Hi<br />
<br />
As per my knowledge <br />
<br />

<pre><code id="code-10-27309267-1"> var my_alert = function ShowAlert() {  
            alert(&quot;This is the test message&quot;);  
        }  
        my_alert();  </code></pre>
<br />
is call back but I am not sure what is this,callback(). <br />
<br />
Please advice.<br />
<br />
Regards<br />
Karan Gupta
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Hi

As per my knowledge 

(CODE)

is call back but I am not sure what is this,callback(). 

Please advice.

Regards
Karan Gupta

this.callback javascript

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

JScript is Microsoft's dialect of the ECMAScript standard that is used in Microsoft's Internet Explorer. JScript is implemented as an Active Scripting engine, so it can be "plugged in" to OLE Automation applications that support Active Scripting, such as Internet Explorer, Active Server Pages, and Windows Script Host. It also means such applications can use multiple Active Scripting languages, e.g., JScript, VBScript or PerlScript.

JScript

A scripting language is a programming language that supports scripts, programs written for a special run-time environment that automate the execution of tasks that could alternatively be executed one-by-one by a human operator. Scripting languages are often interpreted (rather than compiled). Primitives are usually the elementary tasks or API calls, and the language allows them to be combined into more complex programs. Environments that can be automated through scripting include software applications, web pages within a web browser, the shells of operating systems (OS), embedded systems, as well as numerous games. A scripting language can be viewed as a domain-specific language for a particular environment; in the case of scripting an application, this is also known as an extension language.