added check for defined validator method in Ajax jquery_check_value(); switched RDBO_DEBUG off for db_write_timer() & db_read_write_timer(); indexed email_contacts.contact_address col}
git-svn-id: https://jti.org.uk/svn/hmds_lims/trunk@1549 4177bd82-f056-0410-812d-caef170e3fa0
