How do I limit a numeric field to exactly 10 digits with no other characters allowed?



I really, really hate LiveCycle. But I'm stuck with it for this job. I have two form fields that require the user to enter exactly 10 digits (no more, no less, no letters, no punctuation, etc.). The form needs to be Section 508-compliant (always a near-impossibility with LiveCycle), so a blind user needs to know right away if he or she has typed a non-digit into either field.or not entered exactly 10 digits. Any thoughts?