easyui combobox设置选中

1. <select id='xxx' class="easyui-combobox" style="width: 180px;"  
2.                   data-options="panelHeight:'auto',editable : false,  
3.                     valueField: 'EPS_ID',      
4.                      textField: 'EPS_NAME',   
5.                     url:'${pageContext.request.contextPath}/xx/xx.action',  
6.                     onLoadSuccess:function(data){ $('#xxx').combobox('setValue',data[1].EPS_ID);}">  
7.                  </select>