List Australian Post Codes

“We ought to take outdoor walks in order that the mind may be strengthened and refreshed by the open air and much breathing.".
Seneca

:indeterminate

The :indeterminate CSS pseudo-class represents any form element whose state is indeterminate, such as checkboxes which have their HTML indeterminate attribute set to true, radio buttons which are members of a group in which all radio buttons are unchecked, and indeterminate <progress> elements.
:indeterminate css reference