Display data from form in email

I have a form created many years ago by someone alot smarter than I.  They used Adobe Acrobat to make a form and added a button that used Java script to email the form to a group.  I have been able to get the script narrowed down to what I need other than I would like for it to add a field from the form, memberid, in the subject line of the email.  Right now the Java code it this:

// submit the form

if (bContinue) {

    var submitURL;

    if (app.viewerVersion < 9.0)

        submitURL = "mailto:djackson@*********.com?subject=Submitting Completed Form <memberid>&body=Instructions to add this form to a response file:\n1. Double-click the attachment.\n2. Acrobat will prompt you to select a response file.&ui=false";

    else

        submitURL = "mailto:djackson@*************.com?subject=Submitting%20Completed%20Form%20<memberid>&body=Instructions%20to%20add%20this%20form%20to%20a%20response%20file:%0A1.%20Double-click%20the%20attachment.%0A2.%20Acrobat%20will%20prompt%20you%20to%20select%20a%20response%20file.&ui=false";

    currentDoc.submitForm({

        cURL: submitURL,

        cSubmitAs: "PDF"

    });

}

All it is doing is putting <memberid> in the subject line, not the actual number from the memberid field in the form.  Any thoughts?  is this even possible?.