Thanks for all the help with validating.
I created an excercise page to get the feel of
Captcha
Validations
Validation Show if
I made good progress following the video at
watch?v=uVfJ686MLKs
When I tested the finished result I found it rather confusing.
Where the submit boxes which were filled in correctly, the error message disappeared but the text box was also empty and required re entering.
I attach an image to show more clearly.
Can the text entered correctly be retained?