Multipurpose button

I have been struggling for a few days now on a submit button that I need to do many things.

I've read so many forums on this, but still can't get it quite right.

I need this button to email a pdf with the subject line that says District ## <---being a response from the form.

I need it to be electronically signed

I have tried.....

1. I made a submit button that I can click and it will sign and mailto URL, but can't figure out how to get the subject to be dynamic.

2. I have a regular button with a Javascript click code as...

var subject = "District " + district.rawValue;

var myDoc = event.target;
try{  myDoc.mailDoc({
        bUI:false,
        cTo:'receiver@domain.com',// Replace with actual receiver mail address.
        cSubject: subject,
        cSubmitAs:"PDF"
    });
}catch(e){
    // exception handling...
}

and then had it call another Submit button that is invisible that actually does the Submit / Sign etc.

     The problem with this one is it's trying to submit two times.

Does anyone have any magic they can share with me?

I have tried using the HTTP buttons as well to no avail.

Gretchen