JS 两日期相减,获得天数的小例子(兼容IE,FF)

function GetDay() {
    var arrDate, objDate1, objDate2, intDays;

    objDate1 = new Date();
    objDate2 = new Date();

    arrDate = $("#开始日期").val().split("-");
    objDate1.setFullYear(arrDate[0], arrDate[1], arrDate[2]);

    arrDate = $("#结束日期").val().split("-");
    objDate2.setFullYear(arrDate[0], arrDate[1], arrDate[2]);

    intDays = parseInt(Math.abs(objDate1 - objDate2) / 1000 / 60 / 60 / 24);

    $("#天数").val(intDays + 1);
}