I have a master page (document.master) that display a heading on top of the
page and a menu down the left side of the page.  The middle of the page is
where is have my one and only contentplaceholder.  I create a content page
(document.aspx) and set the MasterPageFile to document.master.

Inside the document.aspx I have this ...

<asp:Content ID="Content1" ContentPlaceHolderID="PageDetail" Runat="Server">
    <iframe ID="PageUrl" Name="PageUrl" runat="server" />
</asp:Content>

As the user makes selections in the menu that is located on the
document.master, I change the PageUrl url property iframe to display the
appropriate page (framepage.aspx).  What I'm trying to do is save the data
from the page in the iframe (framepage.aspx) from within the document.master
page after the different menu items have been clicked, but before i navigate
the user to the next page that they have clicked on.  Any ideas how i can
push that data from the framepage.aspx to the document.master.  Or maybe
even from the frampage.aspx to the document.aspx to the document.master.
All the pages that display in the iframe are independent pages with no
association to a master page.

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