image the following:

                 fs_Main
                     |
   -------------------------
   |                                    |
frmControls           frmOverview
    *
      \
       \
      setup.aspx

if i call a windows.open("setup.aspx"....) in frmControls, and then change
some stuff on the setup.aspx page which affects the frmOverview, how do i
refresh the frmOverview from the setup.aspx page?

the variables i'm using are all session so can be picked up from anywhere,
all i need to do is call reload or href on the frmOverview from setup.aspx.

I've tried:-
   setup.aspx call to
"parent.parent.frmOverview.location.href='overview.aspx'"   and get
"parent.parent.frmOverview.location" is not a valid object or is null
   setup.aspx call to " parent.refreshOverview()" where refreshOverview()
exists in frmControls client side script as a function which calls
"parent.frmOverview.location.href=...." and get, in essence, "refreshGrid()
isn't valid on parent"

thanks.