Question

I’ve got a form that I’d like to fill with Javascript. It works!

But when I submit the form, it doesn’t validate, and it says that field is null.

If I fill in the form manually, it works just fine?

The form in question is here

EDIT

Here’s the JS for the form

$('#old').keyup(function () {
    if(this.value > 49){
        $('#new').val(this.value - 49);
        $('#new').attr('disabled', 'disabled'); 
    } else { 
        $('#new').val('0');
        $('#new').removeAttr('disabled');   
    }
});

Answer 1

Disabled fields don’t get submitted by the browser. If you’re looking for their values in PHP, they won’t exist.