如何访问struts jquery网格插件的选定行的数据？

<sjg:gridColumn name="id" index="id" title="ID" sortable="true" width="100" />
<sjg:gridColumn name="name" index="name" title="Name" sortable="true" width="200" />
<sjg:gridColumn name="email" index="email" title="Email" sortable="true" width="300" />
<sjg:grid id="gridtable" caption="My Grid" dataType="json" href="%{remoteurl}" pager="true" navigator="true" navigatorAddOptions="{height:280,reloadAfterSubmit:true}" navigatorEditOptions="{height:280,reloadAfterSubmit:true}" navigatorViewOptions="{height:280}" navigatorSearchOptions="{height:280}" onSelectRow="onSelectRow" />

function onSelectRow(rowId, status) {
    if (status) {
        var rowData = jQuery("#gridtable").jqGrid('getRowData', rowId);
        console.log("选定行的数据：", rowData);
    }
}