js中如何把一个秒 转换成XX分XX秒XXX格式
求代码 谢谢！！！！
[解决办法]

var a = 12347412899,stra = a+'';
var ms = stra.substring(stra.length-3);
var ints = Math.floor(a/1000)
var s = ints%60;
s = s<10?'0'+s:s;
var m = Math.floor(ints/60);
m = m<10?'0'+m:m;
m+'分'+s+'秒'+ms