Why do I get a Javascript error when validating a hidden field?

Posted by ProgrammingPope on Stack Overflow See other posts from Stack Overflow or by ProgrammingPope
Published on 2010-04-16T19:45:34Z Indexed on 2010/04/16 19:53 UTC
Read the original article Hit count: 117

Filed under:

ASP.NET

|

JavaScript

|

validation

I have a custom control and I am trying to validate a hidden field. The validation works fine but I am getting the following Javascript error every time (output from Firebug):

Error: element is null

Code: var currentClassName = ' ' + WebForm_TrimString(element.className) + ' ';
URL: http://localhost:58462/WebResource.axd?d=...

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