<label for="radio_agree_yes"><input type="radio" id="radio_agree_yes" name="radio_agree" value="Y" checked="checked"/>동의합니다.</label><br/>
<label for="radio_agree_no"><input type="radio" id="radio_agree_no" name="radio_agree" value="N"/>동의하지 않습니다.</label>
<br/>
$("input[name=radio_agree]:checked").val() = <span id="result1"></span><br/>
$(":radio[name=radio_agree]:checked").val() = <span id="result2"></span><br/>
$("input:radio[name=radio_agree]:checked").val() = <span id="result3"></span><br/>
<input type="button" id="btn_agree_yes" value="동의하기" onclick="agreeYes();"/>
<input type="button" id="btn_agree_no" value="동의하지 않기" onclick="agreeNo();"/></br>
<input type="button" id="btn_uncheck_radio_box" value="라디오 박스 체크해제" onclick="uncheckRadio();"/>
<input type="button" id="btn_is_checked_radio_box" value="라디오 박스 체크되었는지 확인" onclick="isCheckedRadio();"/>
<input type="button" id="btn_get_radio_value" value="라디오 체크된 값 가져오기" onclick="getCheckedRadioValue();"/>
<br/>
<span id="result_text"></span>