I have a form that gathers financial information from clients using number fields.  Several clients have been inputting commas into the number field as a thousand separator, which creates an error.  My understanding is that this "type=number" input shouldn't be able to accept a comma, and I can't recreate the error when I fill out the form.  Does anyone know why my clients may be able to put commas into a number field and how I can prevent it?