禁用日期选择器上的过去日期

如何在日期时间选择器上禁用当前日期的过去日期？我尝试了一些类似问题的帖子，但无法实现，以下是我尝试过的

<link href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css" rel="stylesheet">
<link rel="stylesheet" type="text/css" media="screen"
 href="http://tarruda.github.com/bootstrap-datetimepicker/assets/css/bootstrap-datetimepicker.min.css">
<script type="text/javascript"
 src="http://cdnjs.cloudflare.com/ajax/libs/jquery/1.8.3/jquery.min.js">
</script> 
<script type="text/javascript"
 src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.2/js/bootstrap.min.js">
</script>
<script type="text/javascript"
 src="http://tarruda.github.com/bootstrap-datetimepicker/assets/js/bootstrap-datetimepicker.min.js">
</script>
<script type="text/javascript"
 src="http://tarruda.github.com/bootstrap-datetimepicker/assets/js/bootstrap-datetimepicker.pt-BR.js">
</script>
<script type="text/javascript">
$(function() {
  $('#datetimepicker2').datetimepicker({
    language: 'en',
    pick12HourFormat: true
  });
});
</script>

<div id="datetimepicker2" class="input-append">
<input data-format="MM/dd/yyyy" type="text"/>
<span class="add-on">
  <i  data-date-icon="icon-calendar">
  </i>
</span>

我也尝试过

$("datetimepicker2").datepicker({ changeYear: true, dateFormat: 'dd/mm/yy', showOn: 'none', showButtonPanel: true,  minDate:'0d' }); 

and

$("#datetimepicker2").datepicker({ minDate: 0 });

给零mindate并且它会禁用过去的日期。

$( "#datepicker" ).datepicker({ minDate: 0});

here is a Live fiddle http://jsfiddle.net/mayooresan/ZL2Bc/ working example http://jsfiddle.net/mayooresan/ZL2Bc/ http://jsfiddle.net/mayooresan/ZL2Bc/

官方文档可以在这里找到 http://jqueryui.com/datepicker/#min-max