Add popup notification functionality to an Adobe Fillable Form

I have a fillable adobe PDF form that we have created and is working great. When users "submit" the form, it is transferred to our website and then e-mailed out to the people who need the info within our organization. The problem is, when they hit the "submit" button, it e-mails us (and them) the form, but gives them no instant notification that the form has been sent or submitted. Most hit the button repeatedly and we get multiple form submissions with the same info. I would like to find some way to have a "popup" message appear in the PDF form that says something like "your account information has been submitted. Please check your e-mail for confirmation"