I have a readonly text field that has an onFocus event that sets focus to
the next field on the form. When I tab to the readonly field focus appears
to be set on the next field (blinking cursor) however, no typed input is
allowed until I either hit tab again or click on the field. Also, if I
click on the readonly field instead of tabbing, focus is set correctly on
the next field and typed input is allowed.

Any ideas?