datepicker invalid entry issue

by john_s

HTML

<input type="text" id="date" />
<button id="show">Show</button>
<div id="output"></div>

JavaScript

$(function () {
    $('#date').datepicker({
        changeMonth: true,
        changeYear: true,
        dateFormat: 'ddMyy',
        numberOfMonths: 2,
        showOn: 'both',
        yearRange: 'c-1:c+2'
    });

    $('#show').click(function () {
        var date = $('#date').datepicker('getDate');
        if (date) {
            $('#output').text(date);
        } else {
            $('#output').empty();
        }
    });
});