javaScript中将时间戳转换成日期格式

 function DateFormt(time, format) {
         var testDate = new Date(time * );
         var o =
     {
         "M+": testDate.getMonth() + ,
         "d+": testDate.getDate(),
         "h+": testDate.getHours(),
         "m+": testDate.getMinutes(),
         "s+": testDate.getSeconds(),
         "q+": Math.floor((testDate.getMonth() + ) / ),
         "S": testDate.getMilliseconds()
     }
         if (/(y+)/.test(format)) {
             format = format.replace(RegExp.$, (testDate.getFullYear() + "").substr( - RegExp.$.length));
         }
         for (var k in o) {
             if (new RegExp("(" + k + ")").test(format)) {
                 format = format.replace(RegExp.$, RegExp.$.length ==  ? o[k] : ("" + o[k]).substr(("" + o[k]).length));
             }
         }
         return format;
     }