Simulate saveAs

Hi,

I try to simulate saveAs into PDF form to save the document in a default directory with a predeterminate name. I have solve the problem but I have had to create a JavaScript file and save it into a route of the Adobe Reader instalation. Also, I have had to create my code into a button.

My question is: Is it necessary to create this JS file or there is another method to do this simulation put all code into de PDF file?

Thanks and regards

Juan Carlos