var today = new Date();
var dt = new Date(today.getFullYear()+1, today.getMonth(), today.getDate());
alert(dt.getFullYear() + "-" + (dt.getMonth()+1) + "-" + dt.getDate())
var dt = new Date(today.getFullYear()+1, today.getMonth(), today.getDate());
alert(dt.getFullYear() + "-" + (dt.getMonth()+1) + "-" + dt.getDate())
now.setFullYear(now.getFullYear() + 1); //这样就在原时间基础上加了一年alert(now);