js本地时钟

js本地时钟，如上图所示，秒是跳动的

 1     // 本地时钟
 2     function clockon() {
 3         var now = new Date();
 4         var year = now.getFullYear(); // getFullYear getYear
 5         var month = now.getMonth();
 6         var date = now.getDate();
 7         var day = now.getDay();
 8         var hour = now.getHours();
 9         var minu = now.getMinutes();
10         var sec = now.getSeconds();
11         var week;
12         month = month + 1;
13         if (month < 10)
14             month = "0" + month;
15         if (date < 10)
16             date = "0" + date;
17         if (hour < 10)
18             hour = "0" + hour;
19         if (minu < 10)
20             minu = "0" + minu;
21         if (sec < 10)
22             sec = "0" + sec;
23         var arr_week = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");
24         week = arr_week[day];
25         var time = "";
26         time = year + "年" + month + "月" + date + "日" + " " + hour + ":" + minu
27             + ":" + sec + " " + week;
28
29         $("#bgclock").html(time);
30
31         var timer = setTimeout("clockon()", 200);
32     }