jquery选择器问题

Question

 <div class="form_row">
                        <div class="terms">
                            <input type="checkbox" name="terms" />
                            我同意 <a href="#">商城条款</a>
                        </div>
                    </div>如何获取checkbox的值？

Answer 1

alert('checkbox是否被选中：' + $(':checkbox').eq(0).attr('checked'));

Answer 2

<input type="button" value="Click" onclick="alert($('.terms > input')[0].checked)"/>