I placed the SharePoint date picker control inside an update panel and when I click on the calendar it gives me this error:

Microsoft JScript runtime error: The value of the property 'clickDatePicker' is null or undefined, not a Function object

The control works outside the update panel without any issues. How do I make it work inside the panel?

  • Welcome to SharePoint.SE! You have a great question here, but I made some slight improvements based on our guidelines. You can also read How to Ask for more general guidelines. – Kit Menke Jul 15 '11 at 14:15

Just include the datepicker.js file explicitly on the page

 <script type="text/javascript" src="/_layouts/datepicker.js"></script>
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