jquery之radio

<td class="queryTitle" width="80px">是否启用</td>
               <td class="queryContent" >&nbsp;
                    <input type="radio" id="addisUse1" name="isUser" value="Y"/>是&nbsp;&nbsp;
                   <input type="radio" id="addisUse2" name="isUser" value="N" checked="checked" />否
    </td>

 if(data.isUse=="Y"){
               $('input:radio[id=addisUse1]').attr("checked","checked");
           }else{
               $('input:radio[id=addisUse2]').attr("checked","checked");
           }