cookie的创建及删除

//cookie的时间设置

var date = new Date();

var expireDays = 10;

date.setTime(date.getTime() + expireDays*1000);

document.cookie = "userId = 828;expires = "+date.toGMTString();

//删除cookie

var date = new Date();

var expireDays = 30;

date.setTime(date.getTime() - expireDays*3600*5*24*1000);

document.cookie = "userId = 828;expires = "+date.toGMTString();