datatimepicker

datetimepicker 时间插件箭头无法显示和input里的图标不显示

<div class="input-group date"> -->
       <!-- 设置input为只读（readonly）状态，不能修改，可以拷贝 -->
       <input type="text" size="16" value="" readonly class="form-control">
       <span class="add-on"><i class="icon-th"></i></span>
   </div>

$('.form_datetime').datetimepicker({
   	format: 'yyyy-mm-dd hh:ii'
   });

解决办法一：
http://eonasdan.github.io/bootstrap-datetimepicker/

<h3>Default component</h3>
   <div class="container">
       <div class="row">
           <div class='col-sm-6'>
               <div class="form-group">
                   <div class='input-group date' id='datetimepicker1'>
                       <input type='text' class="form-control"/>
                       <span class="input-group-addon">
                       	<span class="glyphicon glyphicon-calendar"></span>
                       </span>
                   </div>
               </div>
           </div>
       </div>
   </div>

$(function() {
       $('#datetimepicker1').datetimepicker();
   });