在做项目时需要实现这样一个功能，计算距离上次刷新时间，怎么破？？
------解决方案--------------------
var refreshTime =0;
$(function(){
refreshTime = new Date().getTime();
});
window.setInterval(function(){
var now = new Date().getTime();
var during = parseInt((now - refreshTime)/1000);
var duringMM = parseInt(during/60);
var duringss = during%60;
$("#freshDuringDiv").html("距离上次刷新已过了"+duringMM+"分"+duringss+"秒");
},1000);