2 つの日付ピッカー フィールド間の日数を計算して、その値を入力フィールドに表示しようとしています。
日付ピッカーと手動選択の2つの日付間の日数を取得するにはどうすればよいですか?
この作業マニュアルは、次のもののみを選択します。
$(function() {
$("#arrdatepicker").datepicker({
    showOn: "button",
    buttonImage: "calendar-ico.gif",
    buttonImageOnly: true,
    onSelect: function(dateText, inst) {
        //dateText comes in as MM/DD/YY
        var datePieces = dateText.split('/');
        var month = datePieces[0];
        var day = datePieces[1];
        var year = datePieces[2];
        //define select option values for
        //corresponding element
        $('select#arrmonth').val(month);
        $('select#arrday').val(day);
        $('select#arryear').val(year);
    }
});
$("#depdatepicker").datepicker({
    showOn: "button",
    buttonImage: "calendar-ico.gif",
    buttonImageOnly: true,
    onSelect: function(dateText, inst) {
        //dateText comes in as MM/DD/YY
        var datePieces = dateText.split('/');
        var month = datePieces[0];
        var day = datePieces[1];
        var year = datePieces[2];
        //define select option values for
        //corresponding element
        $('select#depmonth').val(month);
        $('select#depday').val(day);
        $('select#depyear').val(year);
    }
});
});
function dateDifference() {
    var ev,honap,nap;
    var datDate1 = new Date();
    var datDate2 = new Date();
    var napok;
    ev = document.booking.arrivalyear.value;
    honap = document.booking.arrivalmonth.value-1;
    nap = document.booking.arrivalday.value;
    datDate1.setFullYear(ev,honap,nap);
    ev = document.booking.departureyear.value;
    honap = document.booking.departuremonth.value-1;
    nap = document.booking.departureday.value;
    datDate2.setFullYear(ev,honap,nap);
    napok = Math.floor((datDate2-datDate1)/(24*60*60*1000));
    document.getElementById('label').innerHTML=napok+" nights";
}