easyui的combobox默认选中第一个选项

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pmProjectSelect.combobox({         editable:false,         width:165,         url : ctx + '/PmProject/findByProjectMgr',         //combobox默认选中第一个         onLoadSuccess:function(){             var data = pmProjectSelect.combobox('getData');//获取所有下拉框数据             if (data.length > 0) {                                 //如果有数据的话默认选中第一条数据                 pmProjectSelect.combobox('select',data[0].value);                         }         } });