Validate prefilled jQuery form (invalidate on first field clear, ASP.NET and unobtrustive)

Question

I have a form that can be filled, saved, loaded and re-edited.

When it is loaded and re-edited, it probably begins its life valid. When a field is valid upon

Answer 1

This constructor works for me:

$('form').validate({
    onfocusout: function(element) {
       this.element(element);
    }, ...
});