My Ajax Calendar Extender works fine in IE7, but in FF my calender is rendering at the bottom of the screen below the rest of my controls. I think it may a z-index problem but not sure.

Any suggestions?
<asp:TextBox ID="txtStartDate" runat="server" />
<asp:Image runat="server" ID="Image2" ImageUrl="~/Images/Calendar_scheduleHS.png" CssClass="Hand" />
<cc1:CalendarExtender ID="CalendarExtender2" CssClass="apptest" PopupButtonID="Image2"
runat="server" TargetControlID="txtStartDate" Format="dd MMM yyyy">
</cc1:CalendarExtender>
client markup

It is probably CSS... Cant help you much with out seeing whats wrong.