this.print is not working in chrome

I have a PDF file with buttons about every 10 pages that look like a printer icon.

When clicked they will print the entire section of that part of the PDF (about 10 pages).

It does this by printing page ranges.

The current code is looks like this with different page ranges in each button:

this.print({nStart: 9, nEnd: 20});

It works great when someone opens the PDF file in Adobe Reader.

The problem with this code is it doesn't work when someone opens the PDF file in a web browser.