jquery字符串转成时间格式，及获取几天后的时间

//字符串转成时间
function getDate(strDate) {
var date = eval('new Date(' + strDate.replace(/\d+(?=-[^-]+$)/,
function (a) { return parseInt(a, 10) - 1; }).match(/\d+/g) + ')');
return date;
}
//获取几天后的时间
function getAfterDate(d,n) {
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;
}