js获取当前时间。格式为2016-03-23.
var d = new Date(), mon = parseInt(d.getMonth()+1), str = ""; if(mon<10){ str = d.getFullYear()+"-0"+(d.getMonth()+1)+"-"+d.getDate(); }else{ str = d.getFullYear()+"-"+(d.getMonth()+1)+"-"+d.getDate(); } console.log(str)
获取当前时间，特定时间前的日期
//日期时间计算
function getBeforeDate(n) {
var n = n;
var d = new Date();
var year = d.getFullYear();
var mon = d.getMonth() + 1;
var day = d.getDate();
if(day <= n) {
if(mon > 1) {
mon = mon - 1;
} else {
year = year - 1;
mon = 12;
}
}
d.setDate(d.getDate() - n);
year = d.getFullYear();
mon = d.getMonth() + 1;
day = d.getDate();
s = year + "-" + (mon < 10 ? (‘0‘ + mon) : mon) + "-" + (day < 10 ? (‘0‘ + day) : day);
return s;
}
console.log(getBeforeDate(1));//昨天的日期
console.log(getBeforeDate(7));//前七天的日期
原文：http://www.cnblogs.com/haonanZhang/p/6855767.html