<script>
(function(w, d, s) {
  function go(){
    var js, fjs = d.getElementsByTagName(s)[0], load = function(url, id) {
      if (d.getElementById(id)) {return;}
      js = d.createElement(s); js.src = url; js.id = id;
      fjs.parentNode.insertBefore(js, fjs);
    };
    load('//connect.facebook.net/en_US/all.js#appId=272697932759946&xfbml=1', 'fbjssdk');
    load('http://apis.google.com/js/plusone.js', 'gplus1js');
    load('//platform.twitter.com/widgets.js', 'tweetjs');
  }
  if (w.addEventListener) { w.addEventListener("load", go, false); }
  else if (w.attachEvent) { w.attachEvent("onload",go); }
}(window, document, 'script'));
</script>

jQuery 现在用 on 替代以前的 delegate 和 live 了！

$(document).on( "focus", "input.date:not(.hasDatepicker)", function() {
    $(this).datepicker({
        minDate: moment().subtract( "months", 1 ).toDate(),
        maxDate: moment().add( "months", 1 ).toDate(),
        dateFormat: "d M, y",
        constrainInput: true,
        beforeShowDay: $.datepicker.noWeekends
    });
});