Return to the same view from another page

hi,
i have  a problem,
i have a page  with one comboBox and 2 DataGrids.
first i show the combo and after the selection i show a
DataGrid, and
after the selection of the operation on a
DataGrid i  show another Datagrid with the option of update
the
selected row.

my question goes like that :
if i click the update link (hyperLink) to update the
selected row (new
page but in the same window(IE browser).
after updateting the selected row , i want to return to the
last page
(main page) and to see the lattest updates in the second
DataGrid
without begining all this prosess from a begining (combo
then grid and
then another grid).

How can i do that ?
plz Help
Rony