Conditional PopupControlExtender

I've seen all kinds of examples using the popup control extender being tied to textbox, I was wondering if there was a way to tie it to a checkbox or checkboxlist and have it only appear when an item is checked. I havent got any issues getting it to show up, but is it possible and if so how do you make it only appear when the control is being checked.

Thanks for any advice/guidance that you can provide.

You could attach a popup control extender to an invisible control and call its show method in the onclick event handler of the checkbox depending on what value is set.

Here is a post that talks about this problem:

http://forums.asp.net/thread/1466348.aspx