How to set the "select" col_edittype be readonly?
$dg -> add_event('jqGridAddEditBeforeShowForm',
'function(){$("#reportsTo").attr("disabled", true);}');
Alternatively, you can switch to INLINE edit, the select will
be read only.
$dg -> add_event('jqGridAddEditBeforeShowForm',
'function(){$("#reportsTo").attr("disabled", true);}');