Assign DataKey Value on row selection instead of index

[Chandan]

Hi Guys,

I have a telerik grid and above telerik grid i hve textbox which is used for custom search.
This all thing are on popup,
My Problem is when i select a row and for same code i hit for search so at that time the record get highlited at top of grid but it selection
is lost and when again i clear search values than selection persist because when i select row, it index is selected instead of datakey value of that row.

1 important thing the grid on popup is bind through javascript.

Please reply it's urgent

Thanks