title: Manual date entry validation for jQuery UI Datepicker maxDate option
body: <p>I have jQuery datepicker on a page that needs to allow manual entry of the date, but also needs to validate that the date is no more than one day ahead.  The picker control has been limited via the maxDate, but when one manually enters the date, they can enter a date more than one day ahead.  How does one (me) stop that?  Here is what I have so far:</p>
  
  <pre><code>$(".datepicker").attr("placeholder", "mm-dd-yyyy").datepicker({
      showOn: "button",
      maxDate: "+1",
      showOtherMonths: true
  });
  </code></pre>