JavaScript Error - WebForm_PostBackOptions is undefined
<p>I converted a VS 2003 asp.net project to VS 2010 ). This was then installed on a Windows 2008 R2 server with dotnet framework 4.0  and IIS 7.5. Everthing works fine but there is one page that is giving a JavaScript Error.</p>

<p>When I run this page (which is on the server) from my machine( Windows 7,IE 8,dotnet framework 4.0 and IIS 7.5) <strong>it works fine</strong>. However, when the client tries to access this same page from her machine (same configuration as my machine, some clients have IE 9 too), it gives 'Error on Page' at the bottom the browser screen. When I click on the error, this is what I get </p>

<p>Message: Syntax error
Line: 549
Char: 1
Code: 0
URI: <code>http://intranet1_tsdb/TOrders/WebResource.axd?d=3eCuQk6PLtyPF3T1Osm9zbLiAZI1lHoNMz3GVH11O-xvv729JwsqtHtahkxYveMCDaWNSlJdZo-v2BOzq0ihvcheZ5vX9K4r04fZQC_T5qk1&amp;t=635023021324402002</code></p>

<p>Message: 'WebForm_PostBackOptions' is undefined
Line: 1
Char: 1
Code: 0
URI: <code>http://intranet1_tsdb/TOrders/techs/orders/default.aspx?&amp;tid=EP9996&amp;oid=59131&amp;fmtid=orders</code></p>

<p>NOTE: The client is still accessing the old version (VS 2003) from their machine and it is working fine. It gives error in the new version. </p>

<p>Is there any ASP.NET setting that I need to change/install on the client machine for this javascript to work. This is the only page that is giving an error.</p>

<p>When I hover the cursor over the OK button, this is what I see</p>

<p><img src="http://i.stack.imgur.com/sjsFQ.jpg" alt="enter image description here"></p>
