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Please tell me where can I write javascript for a sharepoint site and what are the possible ways to write a javascript code for a sharepoint site.

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Approach 1 :

You can define your java script code in code behind file and than you can register it using Page.IsClientScriptBlockRegistered as shown below.

private const string strJQueryScript = "<script type=\"text/javascript\">"+
                                         Your Script content here.

Once you created your script you can later use following code in "OnPreRender" method.

protected override void OnPreRender(EventArgs e)

if (!Page.IsClientScriptBlockRegistered("jquerythickbox"))


You can place ContentEditorWebPart on the page and write Javascript code there.


Create your javascript file and put it in _Layouts folder. Once you have your javascript file you can modify your master page and register tag as shown below.

<script type="text/javascript" language="javascript" src="/_layouts/YourFolderName/YourFile.js"></script>
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It can be even easier than the other answers: You can simply put the JavaScript into a Content Editor Web Part. It all depends on what your goals are, e.g., how widely you want to use the script, what it does, etc.

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If you just want to add some JavaScript to the existing user interface without having to modify your existing pages or solution then check out our free Muhimbi SharePoint Infuser tool.

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Could you please edit this answer to make it clear this is your company's product? It does answer the question directly so I guess isn't technically spam, but clear attribution would help. Thanks! – Alex Angas Feb 15 '11 at 2:33
No worries Alex, I have reworded it. It is a free tool so didn't bother with the attribution. – Muhimbi Feb 15 '11 at 8:58

Here is a question that I asked on the matter Click Here

As you will see I also made use of a CEWP.......

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