Opening an aspx page using ModalPopupExtender

[ruthie]

Hi,

I installed yesterday AjaxControlToolkit and I try to use ModalPopup
for the first time.

When the user clicks a button, a modalPopup should appear which
contains an aspx page.

Until now, I implemented it using window.showModalDialog. I would
like to change implementation to using the modalPopup.

However, I noticed that I should fill the "PopupControlID" which
contains the id of a panel.

It is possible to open an aspx page instead of a panel?

Thanks so much.

Ruthie.