save PDF form into non editable PDF through button (SaveAs) using java script

[#1]

I am creating PDF form using LiveCycle 8.0.

1) Using SaveAs the form in PDF (non editable) by using button and javascript

  ( app.execMenuItem("SaveAs");

     myScript.LoclAllFields("form1");) this code is not working.

.

2) show / hide the field by choosing the drop down List.

Like, In drop down list their is tree option name  a, b, c. when select "A" hide the field_A and select "B". then show the field_A.