Q1. When you buy your new House? [ANSWER IS CHOOSE MONTH AND YEAR]
ANSWER: 2013 OF JUNE [DATE FORMAT]
Q2. When you move to your new house? [ANSWER IS MONTH AND YEAR]
[valid answer in Q2 cannot less than Answer in Q1, so if responden choose date less of 2013 of June will rise alert message]
How to make date validation like question above in lime survey?