HTML Printing issue

in my web application there are some pages that are for A4 size and some for Legal Size paper. even if there is a Legal sized paper in printer it prints a page designed for one legal size paper on two when A4 is by default selected in page setup. I want to programmatically set appropriate paper size before printing each page. is it possible?

Why don't you check your printer setting and adjust them each time you want to print a different size page.
I know it could be don't programmatically using a javascript functions but unfortunately I don't know how but it will be a tedious job to do.

anyone else?