Taking a print of the sales order created in portal?

Hi all,

For suppose i have created a sales order (or a billing invoice) in the portal.now my question is can i take a print of that similar to that on the R/3 (i.e only the billing invoice or sales order). i need it as a seperate copy rather than as a web page print . Is it possible if it is then how?

Thanks in advance,

Regards,

Tilak.