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Error in doPostBack function for Calendar control

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I'm having the same problem as this guy:

Basically it comes down to this:

- I have an "application template" (.aspx) that loads user controls
- The <form> tag(s) are in the user controls (.ascx)
- One of these user controls has a Calendar control
- When you view the page in a browser, .NET has given the form the
name: "_ctl0:Form1"
- The __doPostBack javascript function contains the line: "theform =

Now this isn't valid javascript, and of course the postback doesn't
work (plus a javascript error on page load).

I'm guessing this is a bug, since it is .NET that generates illegal
javascript code, while it should be possible to have a calendar control
within a user control, right?

Is there a workaround? Can I write my own __doPostBack function and use
eg. forms[0] instead of the form name?

Putting the <form> within the .aspx is not an option, as there already
numerous applications where the <form> is in the .ascx.

Any help is greatly appreciated.

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