JScript error on ASP.NET page.

[Tap]

I wanted to use the calendar.aspx file that is used by Time Tracker. So I copied the related files.

Calendar.*
script.js

into my local web folder. It gives me the following error on selection of the Date and then pressing the OK button. The error occurs on the following line in script.js.

if (postback)
__doPostBack(id,'');

Microsoft JScript runtime error : object expected

I am using .NET Framework 1.1 and VS.NET 2003. What do I need to do to resolve this error ?

Thanks,

Tap