Callback by StateSave clicked filter button

yogi77

Hi Guy's

I use the "stateSave" option and filter buttons.
The buttons have a background change when i click it.

$('#documents').DataTable({
        "stateSave": true,
        "stateDuration": -1,
    });

    var tabledocuments = $('#documents').DataTable();
    $('#doc').click(function () {
        tabledocuments.columns(2).search("Dokument").draw();
        $(this).css('background-color','red');
        $('#pic').css('background-color','black');
    });

   $('#pic').click(function () {
        tabledocuments.columns(2).search("Bild").draw();
        $(this).css('background-color','red');
        $('#doc').css('background-color','black');
    });
});

when i coming back to the table, is the button no longer red, the filter is correct.
can i use the callback function to set this button red?

thanks for your help and sorry for my bad english