怎么样使用bootstrap printthis？

<script src="<%=basePath %>bootstrap/js/printThis.js"></script> 

<!-- 二维码弹出框 --> 
<div class="modal fade" id="myModal_qrcode" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> 
 <div class="modal-dialog" role="document"> 
 <div class="modal-content"> 
  <div class="modal-header"> 
  <button type="button" class="close" data-dismiss="modal" aria-label="Close"> 
   <span aria-hidden="true">×</span> 
  </button> 
  <h4 class="modal-title" id="myModalLabel">二维码</h4> 
  </div> 
  <div class="modal-body"> 
  <center> 
   <div id="qrcode"></div> 
   <table> 
   <tbody> 
    <tr> 
    <td> 
     <label class="col-sm-4 control-label" for="equ_name_qrcode"><h7>设备名称:</h7></label> 
     <div class="col-sm-8"> 
     <input class="form-control" id="equ_name_qrcode" type="text"/> 
     </div> 
    </td> 
    <td> 
     <label class="col-sm-4 control-label" for="equ_ip_qrcode"><h7>设备IP:</h7></label> 
     <div class="col-sm-8"> 
     <input class="form-control" id="equ_ip_qrcode" type="text"/> 
     </div> 
    </td> 
    </tr> 
   </tbody> 
   </table> 
  </center> 
  </div> 
  <div class="modal-footer"> 
  <button type="button" class="btn btn-default" data-dismiss="modal"> 
   <span class="glyphicon glyphicon-remove" aria-hidden="true"></span>关闭 
  </button> 
  <button type="button" id="btn_print" class="btn btn-primary" data-dismiss="modal"> 
   <span class="glyphicon glyphicon-floppy-disk" aria-hidden="true"></span>打印 
  </button> 
  </div> 
 </div> 
 </div> 
</div> 

 $("#btn_print").click(function(event) { 
 /* Act on the event */ 
  $("#qrcode").printThis({ 
  debug: false, 
  importCSS: false, 
  importStyle: false, 
  printContainer: true, 
//  loadCSS: "/Content/Themes/Default/style.css", 
  pageTitle: "二维码", 
  removeInline: false, 
  printDelay: 333, 
  header: null, 
  formValues: false 
  }); 
// alert("等待打印"); 
 });