JS 实现前天昨天今天明天后天大后天

function GetDateStr(AddDayCount) {
var dd = new Date();
dd.setDate(dd.getDate() + AddDayCount); //获取AddDayCount天后的日期 
var y = dd.getFullYear();
var m = dd.getMonth() + 1; //获取当前月份的日期 
var d = dd.getDate();
return y + "-" + m + "-" + d;
}
document.write("前天：" + GetDateStr(-2));
document.write("<br />昨天：" + GetDateStr(-1));
document.write("<br />今天：" + GetDateStr(0));
document.write("<br />明天：" + GetDateStr(1));
document.write("<br />后天：" + GetDateStr(2));
document.write("<br />大后天：" + GetDateStr(3));