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'Sys' is undefined javascript error

Answer 1

A:

I have the same issue, plz check this thread..

http://stackoverflow.com/questions/1437799/getting-javascript-sys-is-undefined-error

I think you need to check this http://geekswithblogs.net/ranganh/archive/2007/07/15/113963.aspx

Muhammad Akhtar 2009-10-16 10:50:14

Answer 2

+2 A:

Ensure you have a Scriptmanager on the page and the script is below the scriptmanager. Maybe try to put your script tag into body and see what happens.

I don't know how you can fix that that its not in the body, but maybe there is a callback from Sys when its loaded

You don't need brackets to tell which function is neeeded:

Sys.WebForms.PageRequestManager.getInstance().add_endRequest(onUpdated);

k0ni 2009-10-16 10:52:48

I've added the JS below the scriptmanager and it worked!But I don't like the idea of having js in the body... Can something be done about that?Any way, update your answer(add what what you've posted in comment) and i will Accept it :)

dani 2009-10-16 11:01:15

Answer 3

+1 A:

If that is your full code, then the problem is that the Microsoft AJAX libraries aren't being included. If it isn't your full code, then you need to post more as it's a little hard to get beyond the fact that the library isn't included. Somewhere in your file -- prior to the line you are having problems with you need to have a javascript include like:

<script type="text/javascript" src="/scripts/MicrosoftAjax.js" />

As well as probably a few others.

Note: I'm talking about the generated source. Showing more complete markup would probably also suffice.

tvanfosson 2009-10-16 10:53:28

The problem was placing the JS code BELOW the scrip manager...

dani 2009-10-16 11:02:23

Answer 4

A:

I'm a bit late to the discussion here, but a simple solution is to create a "ASP.NET AJAX-Enabled Web Site" in Visual Studio and then merge the web.config from that site with your existing site.

In this way you get all the configuration you need without having to carefully read through a lot of docs. Speed is of the essence and all that :)

Grubl3r 2009-12-02 10:06:06

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'Sys' is undefined javascript error

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