javascript 当前日期加(天、周、月、年)

//create the date
var mydate = new date();

//add a day to the date
mydate.setdate(mydate.getdate() + 1);

//add a week
mydate.setdate(mydate.getdate() + 7);

//add a month
mydate.setmonth(mydate.getmonth() + 1);

//add a year
mydate.setyear(mydate.getyear() + 1);