[javascript]날짜 지정 event (로또 회차)

  <div id="lotto_s" style="margin-left:-10px; text-align:center;">제
    <script>
        var cnt = 1;
        var now = new Date();
        var date = "2002-12-07";
        var date_arr = date.split("-");
        var year = now.getFullYear();
        var month = now.getMonth()+1;    
        var day = now.getDate();
        var stDate = new Date(date_arr[0], date_arr[1], date_arr[2]);
        var endDate = new Date(year, month, day);
        var btMs = endDate.getTime() - stDate.getTime() ;
        var btDay = btMs / (1000*60*60*24) ;
        var btDays = btDay-1;
        var asd = Math.round(btDays / 7);
        document.write(cnt + asd );
    </script>
    회
</div>