Srno in crystal report or Serial number in crystal report or srno in formula

numberVar f_sno=0;
stringVar f_booth="";
WhileReadingRecords;

if({command.booth_no} = f_booth) then
(
f_booth := {command.booth_no};
f_sno := f_sno + 1;
)
else
(
f_booth := {command.booth_no};
f_sno :=  1;
)

Direct landscape print in javascript or direct landscape print in jquery or direct landscape print in html

<script src="~/assets/js/jquery.min.js"></script>
<script>
    $(document).ready(function () {
        window.print();
    })
</script>
<style type="text/css" media="print">
    @page {
        size: landscape;
    }
</style>