如何使用Js插件qrcode.Js生成二维码功能？

<script type="text/javascript" src="<%=basePath %>bootstrap/js/qrcode.js" charset="UTF-8"></script> 

<input type="hidden" id="content" value="" /> 
 <!-- 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> 

// 二维码对象 
 var qrcode; 
function showCode(id) { 
 var rowid=$("#grid-table").jqGrid("getGridParam","selrow"); 
 if (rowid != null) { 
  var rowData = $("#grid-table").jqGrid('getRowData',rowid); 
  // 获取内容 
  $("#content").val("公司名称："+rowData.companyName+","+"设备IP："+rowData.deviceIP+","+"投运时间："+rowData.inTime); 
  $("#equ_name_qrcode").val(rowData.deviceName); 
  $("#equ_ip_qrcode").val(rowData.deviceIP); 
 } else { 
  toastr.error("点击错误，请重新点击"); 
  return; 
 } 
 // 清除上一次的二维码 
 if(qrcode){ 
  $("#qrcode").html(""); 
 } 
 // 创建二维码 
 qrcode = new QRCode(document.getElementById("qrcode"), { 
  width : 150,//设置宽高 
  height : 150 
 }); 
 $("#myModal_qrcode").modal(); 
// $(".btn_print").attr('id','btn_print'+id); 
 qrcode.makeCode(document.getElementById("content").value); 
}