How to alter this print script

Hi!
I found this piece of code:

on (Release) {
var pj = new PrintJob();
var success = pj.start();
if(success)
{
pj.addPage(0,{xMin:130, xMax:930, yMin:0, yMax:1100}, {printAsBitmap:false}, 21);
pj.send();
}
delete pj;
}

I want to alter it. My document dimensions are 800 px width and 500 px height. I want to print the whole page and not a enlargement. How can this be done?

Please help me out on this one…

/Joakim