How to instantiate a Lock Object for setLock() for signature fields?

The "setLock()" entry in the Acrobat JavaScript Reference has a spec for the Lock Object. This is a generic object, which means that it can be defined as a JavaScript Object Literal, like this

var myLock = {action:"Include",fields:["myfld1","myfld2"]};

You can see an example of the lock object by setting up the lock properties manually and then calling "getLock()" from the JavaScript Console.

this.getField("mySig").getLock().toSource();

I am trying to prepare a PDF form with a signature field which will lock all the other fields when signed. I was struggling with a similar problem that frlong had but after creating a function in a folder level something started working. So what I have for now is a button which signs the signature field and locks all other fields. The problem is I am passing the password and ID path within the function which simply makes passwords useless. What I would like to obtain is a no-button system with a signature field only, which will lock all other fileds after signing, save to chosen direction and e-mail to a predefined address.

function LockAfterSigning(sMyActions, sMyFields, sMySignature)
{
var MyLock = {action:sMyActions,fields:[sMyFields]};
var f = this.getField(sMySignature);
var oLock = f.getLock();
oLock = MyLock;
f.setLock(oLock);


var ppklite = security.getHandler("Adobe.PPKLite");
var oParams = {
cPassword: "1234qwer",
cDIPath: "/C/ID/John.pfx" // Digital signature profile
};
ppklite.login(oParams);
f.signatureSign(ppklite,
{
password: "1234qwer",
}
); //End of signature



ppklite.logout()

}

Thanks for any support.