function checkDa(){
var myDate = new Date();
var myYear = myDate.getYear();
var myMonth = myDate.getMonth();
var myDay = myDate.getDate();
var mdate = myYear + "-"
+ (myMonth < 9 ? ("0" + (myMonth + 1)) : (myMonth + 1)) + "-"
+ (myDay < 10 ? ("0" + myDay) : myDay);
var EffectiveDate = fm.EffectiveDate.value;
var DeadLine = fm.DeadLine.value;
if (EffectiveDate < mdate) {
alert("生效日期需大于等于当前系统日期,请重新输入!");
return false;
}
return true;
}
// 其中year_res为2020, month_res为08
var yearMonthNew = new Date(year_res+"/"+month_res+"/"+"01");
// setMonth: 设置新的年份, 其中getMonth获取月份, +2 并增加两个月
yearMonthNew.setMonth(yearMonthNew.getMonth() + 2);
// 如果比较日期, 可以直接 > < = 来进行判断