I'm working with a Yahoo online store cart which currently requires that the user enter an email address. Unfortunately, Yahoo provides zero validation for the email field.
I've posted a very simplified version of the cart html below...
Here's what I was thinking might be possible:
3. When the values are NOT identical, show a red warning mesage next to the field
4. User would never be prevented from proceeding... even if values are different
I'll split the points up between the most helpful answers, even if they are in a different direction than my idea above.
<FORM name="CheckoutForm" method="post" action="yadayadayada">
<INPUT type="text" class="text" name="various.other.address.fields" id="xyz">
<INPUT type="text" class="text" name="miscDS.shopperEmailAddress" id="billing-email">