how to prevent data being entered
Sorry, i posted this on the server forum incorrectly.
thanks so much for your help with earlier question re: Visit dates.
My next question relates to how i can prevent a field from having data entered into it if a previous field has been answered 'no' or how can i just get it validated so that a message appears to say that since they answered no to previous question, they shouldn't be entering data into this field.
e.g. if 'Pa Inf Maternal' has been answered yes , then they should not be entering data into 'Blood test' field.
hope this is clear.