I am not sure if this is related, but I have two issues with field focus.
I have all fields hidden until the previous field is validated:
On Field A, I have a validation script-
When I attempt to tab to the next field (Field B) it is highlighted, but the cursor will not enter the field - I have to manually click. in those field that are already visible, I have no problem tabbing.
I have the same validation script in a dropdown list (along with a calculation that is performed based on the value and the result is entered into a mother field, which is hidden using the above script). However, the calculation does not appear when I first select the item in the drop down. I then have to click in the drop down list field again to have it calculate.
Are these related or two different issues
"entered into a another field"
Your code is incorrect. You need to edit the field's display property, not the actual field itself.