I once ran into this problem of disappearing labels in the input fields leading to incorrect submissions. The design didn't allow for proper labels, being a st

I once ran into this problem of disappearing labels in the input fields leading to incorrect submissions. The design didn't allow for proper labels, being a standard first name and email address form in a small space, and the client wouldn't budge on it. Often we would see people putting their email address in the first input field. Eventually I used the email address verification Javascript from the second field on the first field. If an email address was found, it alerted to point that out and asked for first name in the first input while moving the email address to the second, correct input.