I wonder if any of you could help me on this. I am new to using AJAX, so do please explain as simply as possible. I have a ModalPopUpExtender which, for some reason, will not bring up the pop up as expected. I did suspect that the script manager was not being inherited from the master page, but the RoundedCornersExtender seems to work as expected, so that would rule that issue out. I know the number of properties of the extender is a little basic at the moment, but I just want to get the div to appear as a pop up before I start assigning the buttons or formatting the background. The code is as follows:

And the code behind for the 'onclick' is: protected void btnIntroductionText_Click(object sender, EventArgs e) { divProphetAndLoss1.Visible = true; } Should the div be inside a panel for it to work, or can it work just within the div itself?