how to change printout format i.e xps format into other format....see code

function CallPrint(strid) {
            var prtContent = document.getElementById(strid);
            var WinPrint = window.open('', '', 'letf=0,top=0,width=400,height=400,toolbar=0,scrollbars=0,status=0');
            WinPrint.document.write(prtContent.innerHTML);
            WinPrint.document.close();
            WinPrint.focus();
            WinPrint.print();
        }

tbl.OnClientClick="CallPrint('"+tbl.UniqueID+"')"

hey guys i am using this code to generate printout but format is xps......how to change format through code. see code and suggest modification in above code

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thanks and regard love4csharp