var days = new Array();
//当天
var Date8 = new Date();
//前一天
var Date7 = new Date(Date8.getTime() - 24*60*60*1000);
//前两天
var Date6 = new Date(Date8.getTime() - 48*60*60*1000);
//前三天
var Date5 = new Date(Date8.getTime() - 72*60*60*1000);
//前四天
var Date4 = new Date(Date8.getTime() - 96*60*60*1000);
//前五天
var Date3 = new Date(Date8.getTime() - 120*60*60*1000);
//前六天
var Date2 = new Date(Date8.getTime() - 144*60*60*1000);
//前七天
var Date1 = new Date(Date8.getTime() - 168*60*60*1000);