jquery日历控件实现方法分享(2)

//when year and month in the input box changes
            inputChange: function() {
                $('#calendar_year, #calendar_month').bind('change', function() {
                    var year = $('#calendar_year').val(),
                        month = $('#calendar_month').val();
                    if (!/^\d{4}$/.test(year)) {
                        alert('please input four-digit year');
                        return false;
                    }
                    if (!/^\d{1,2}$/.test(month) || (month > 12 || month <= 0)) {
                        alert('please input proper month');
                        return false;
                    }
                    //Initialize after year and month changes
                    init_day_numbers(year, month);
                });
            },

//click to change year and month
            buttonChange: function() {
                $('#last-year').bind('click', function() {
                    var lastYear = parseInt($('#calendar_year').val()) - 1 > 0 ? parseInt($('#calendar_year').val()) - 1 : 1;
                    $('#calendar_year').val(lastYear);
                    init_day_numbers(lastYear, $('#calendar_month').val());
                });

$('#last-month').bind('click', function() {
                    var lastMonth = parseInt($('#calendar_month').val()) - 1 > 0 ? parseInt($('#calendar_month').val()) - 1 : 12,
                        thisYear = lastMonth == 12 ? parseInt($('#calendar_year').val()) - 1 : $('#calendar_year').val();
                    $('#calendar_month').val(lastMonth);
                    $('#calendar_year').val(thisYear);
                    init_day_numbers(thisYear, lastMonth);
                });

$('#next-year').bind('click', function() {
                    var nextYear = parseInt($('#calendar_year').val()) + 1;
                    $('#calendar_year').val(nextYear);
                    init_day_numbers(nextYear, $('#calendar_month').val());
                });