[调试bug]JS:getFullYear is not a function

报错，getFullYear is not a function

原报错的代码：

this.formatFun = function(time) {
   var year = time.getFullYear();
   var month = time.getMonth()+1;
   var date = time.getDate();
   var hour = time.getHours();
   var minutes = time.getMinutes();
   var seconds = time.getSeconds();
   return year+'年'+month +'月' + date +'日' + hour +'：' + minutes+'：'+ seconds
  }

原因：js调用的方法中少了这一句：

var time = new Date(time);