Reference to extended table fields

[Koji Yanase]

var tbla = g_form.getReference('u_table_a');

if (tbla.u_field_b == 'true'){.....................

The code above does not work because 'u_field_b' belongs to 'u_table_b' which is an extended table of 'u_table_a'.

Is there any easy way to access 'u_field_b' using sys_id of 'u_table_a' in client script?

[JJ1]

Refer below thread.

g_form.getReference returns an undefined value