>Hi everybody,
>
>I have a button on my page that I set Enabled property to false in the Load event (I can also do it in ASPX directly).
>
>I also have a GridView with checkboxes. I added JavaScript code to enable the button once I click on the checkbox.
>
>In the server side code for the button I also try to disable it again using this.btnApprove.Enabled = false;
>
>I found two problems:
>
>1) I had a confirmation message for this button that doesn't appear anymore (in the ASPX OnClientClick).
>
>2) When I enable button in the Client side using disabled = true; I can no longer disable the button from the server-side code.
>
>Do you know what may be wrong? One important thing - I'm using UpdatePanel & UpdateProgress on this page. The button is not included into UpdatePanel (it triggers it).
>
>Thanks a lot in advance.

Are there many checkboxes trying to influence a single button? or is it 1 checkbox/button?
Try it without the "this."
Just a guess but I have found the 'this' reference to be unreliable.