Error : "Web_Postbackoptions is undefined" in asp.net 1.1 with IE 9

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I have an application running from last 3 years on live. But i got this error while i was trying to access login page on IE 9 (Ver : 9.0.8112.16421) with windows 7 but not able to reproduce on other system with same OS and IE version

Error is "<b>Web_Postbackoptions is undefined</b>"

Please note that application was developed in asp.net 1.1 also is working fine in older versions of IE and other browsers too like chrome and mozilla.

Any suggestions ?

Posted 16-Nov-11 0:08am

deepakdynamite

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Mel Padden · Answer 1 · 2011-11-16T00:42:00

Sounds like a Javascript function which is needed to submit the form isn't being created correctly. Search the HTML source for that function; perhaps it is using some deprecated JS syntax which is causing the function declaration to fail. The function will then be set to "undefined" in the object model and when the login button calls it you get your error message.

http://www.xefteri.com/articles/show.cfm?id=18[^]

http://delphi.about.com/library/weekly/aa051705a.htm[^]

ASP.NET registers default postback events with JavaScript, IIRC __doPostBack() was the one I used to call back when I was working with WebForms (thank Gaaawwd those days are over).

Have a looksee at what ASP.NET is rendering. All sorts of weird and wonderful things no doubt.