Sharepoint InputFormTextBox not working on updatepanel?

Question

I have two panels in update panel. In panel1, there is button. If I click, Panel1 will be visible =false and Panel2 will be visible=true. In Panel2, I placed SharePoint:InPutFormTextBox. It not rendering HTML toolbar and showing like below image.

 <SharePoint:InputFormTextBox runat="server"   ID="txtSummary" ValidationGroup="CreateCase" Rows="8" Columns="80" RichText="true" RichTextMode="Compatible" AllowHyperlink="true" TextMode="MultiLine" />

http://i700.photobucket.com/albums/ww5/vsrikanth/careersummary-1.jpg

Answer 1

SharePoint rich text fields start out as text areas, and some javascript in the page load event replaces them with a different control if you are using a supported browser.

With an update panel, the page isn't being loaded, so that script never gets called.

Try hiding the section using css/javascript rather than the server side visible property. That generally lets you make whatever changes you need to the form without sharepoint seeing any changes.