[Solved] unselect "all" checkbox in header when a checkbox in item rows is unchecked

[sf]

I have a "selectitem" checkbox  column and a "selectALL" checkbox in the column header.

When I unselect a checkbox in a item row I want to locate and unselect "selectALL" checkbox in header. 

How can I locate the "selectAll" checkbox in header? please help.

[Princy]

Hello,

Check out the following code library submission which explains with an application on how to uncheck  the "Select All" checkbox in the header of the grid if a checkbox in any of the rows in the grid is unchecked using the Grid's RowSelected/RowDeselected client events.
GridClientSelectColumn -- (un)check "Select All" check box automatically

Thanks
Princy.