$(document).ready(function() {
    input_initialization();
});


function change_numberbox_value_handler() {
    if (!has_numberbox()) {
        numberbox_error();
    }
    else {
        numberbox_noerror();
    }
}


function decrement_number() {
    var number = parseInt($('.number-box input').val());
    if (number>1) {
        number--;
        $('.number-box input').val(number);
    }
}


function increment_number() {
    var number = parseInt($('.number-box input').val());
    number++;
    $('.number-box input').val(number);
}


function has_numberbox() {
    if ($('.number-box input').val()!=='' && $('.number-box input').val()!=='0') {
        return true;
    }
    else {
        return false;
    }
}


function numberbox_error() {
    $('.number-box').addClass('input-error');
}


function numberbox_noerror() {
    $('.number-box').removeClass('input-error');
}


function numberbox_get() {
    return $('.number-box input').val();
}


function input_initialization() {
    $(".number-box input").keydown(function (e) {
        if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1 ||
            (e.keyCode == 65 && e.ctrlKey === true) ||
            (e.keyCode == 67 && e.ctrlKey === true) ||
            (e.keyCode == 88 && e.ctrlKey === true) ||
            (e.keyCode >= 35 && e.keyCode <= 39)) {
                 return;
        }
        
        if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
            e.preventDefault();
        }
    });
    
    $(".justnumber").keydown(function (e) {
        if ($.inArray(e.keyCode, [46, 8, 9, 27, 13, 110, 190]) !== -1 ||
            (e.keyCode == 65 && e.ctrlKey === true) ||
            (e.keyCode == 67 && e.ctrlKey === true) ||
            (e.keyCode == 88 && e.ctrlKey === true) ||
            (e.keyCode >= 35 && e.keyCode <= 39)) {
                 return;
        }
        
        if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
            e.preventDefault();
        }
    });
}