javascript怎么设置radio

<div>

    <label><input type="radio" name="sex" value="1" id="isMale" />男</label>

    <label><input type="radio" name="sex" value="2" id="isFemale" />女</label>

</div>

<script>

    //js设置radio选中

    if(data.isDefault==1){

        $("#isMale").attr("checked","checked");

        $("#isFemale").removeAttr("checked");

    }

    //获取选中的input的value和html

    $("input[type=radio][name=sex]:checked").val();

    $("input[type=radio][name=sex]:checked").html();

</script>