Modal Popup Extender blinks on page on initial page load

Hello,

I am getting some undesirable behavior from the modal popup extender control. Everything works fine except for the fact that when i load or reload the page, you can see the modal popup box at the bottom of the page blink for about 1 second and then disappear. Why does it do this? Has anyone else seen this before? I would rather not see the box blink at the bottom of the page when loading the page, it just looks weird. Other than that, it appears fine when i click my button. Its just annoying to see it on the page load.

Any ideas here?

usually you need to set the style='display:none'

awsome...that did the trick...in the panel tag i did this:

<asp:Panel ID="pnlModalCheckUser" runat="server" Height="110px" Width="250px" CssClass="modalPopup"style="display:none">

even though style didn't come up as a valid property for the asp:panel tag in intellisense. But it works, i'm assuming it just passed the style along to the processed div tag.

Thanks a bunch!