easyui-numberspinner实现双箭头效果

<span style="position: relative;">
              <input class="easyui-numberspinner" id="newStayDays_continueRoom" style="width:150px;" data-options="editable:false,min:0,precision:1
                      ,onChange:function(newValue,oldValue){
                          continueRoom_livingDetail(newValue);
                      }"/>
              <span class="textbox-addon textbox-addon-right" style="left: 110px; top: -2px;height:22px;border: 1px solid #B1C242;">
                  <a href="javascript:void(0)" class="textbox-icon spinner-arrow" icon-index="0" 
                         tabindex="-1" style="width:18px;height:22px;">
                     <a  class="spinner-arrow-up" id="iop" tabindex="-1" style="height:10px;position:relative;top:-22px;cursor:pointer;"></a>
                     <a  class="spinner-arrow-down" id="jkl" tabindex="-1" style="height:10px;position:relative;top:-22px;cursor:pointer;"></a>
                  </a>
              </span>
</span>