title: setting minimum date in jQuery datepicker
body: <p>I have to set the minimum date in the jQuery datepicker.</p>
  
  <p>Only allowed values are 1st of the next three months. So I want the calendar to open to the next month instead of existing month.</p>
  
  <p>when I set the min Date to +1M it does open Jan 2014 calendar instead of dec 2013 but the 1st of that month is disabled.</p>
  
  <p>If I set minDate to -0, I see dec calendar with no valid select option as 1st has already passed. The user has to go to next month to and the 1st is selectable.
  My code is: </p>
  
  <pre><code>$("#effdatepicker").datepicker({
      showOn: "button",
      buttonImage: "images/calendar.gif",
      buttonImageOnly: true,
      minDate: "+1M",
      maxDate: "+3M",
      beforeShow: function () {
          if (jQuery('#enddatepicker').val() != "") {
              jQuery(this).datepicker('option', 'maxDate', jQuery('#enddatepicker').val());
          }
  
      },
      beforeShowDay: function (date) {
          //getDate() returns the day (0-31)
          if (date.getDate() == 1) {
              return [true, ''];
          }
          return [false, ''];
      }
  
  });
  </code></pre>