IF your form fillers have acrobat OR the form is going to be reader extended THEN
you can go wild with the email buttons
if the above assumptions are valid
try something like this
grab a normal button - not the pre-made email button and pop on it's click event put
var mail;
var address = email.rawValue; //[or whatever.rawValue equates to email text field]
var sub = subject.rawValue;
mail = "mailto: " + address + "?subject=" + sub;
event.target.submitform({
cURL: mail,
bEmpty: true,
cSubmitAs: "xml",
cCharset: "utf-8"
})
and test - hopefully so far so good
then we need to get funky with the var sub = subject.rawValue
so change the var sub line to read
var sub = ("PRF-" + subject.rawValue);
and there is your email subject dynamically specified as PRF- SCRIPT_HINT for exmaple
where SCRIPT_HINT is the subject.rawValue
can fool about with contents too i think - but first see if your fillers are able to use these functions aye?