单选 textarea 赋初值

自闭合标签赋初值用$().val()，比如：<input type="text" name="text" value="123">

闭合标签赋初值用$().text()，比如：<textarea id="id_textarea"></textarea>

# 给textarea标签赋初值
$(\'#id_textarea\').text($(\'#form_text\').attr(\'my_text\'));

// 给单选 赋初值
$("#id_0").attr("checked", $(\'#id_radio\').attr(\'gender\') == \'男\' ? true : false);
$("#id_1").attr("checked", $(\'#id_radio\').attr(\'gender\') == \'女\' ? true : false);
$("#id_2").attr("checked", $(\'#id_radio\').attr(\'gender\') == \'未知\' ? true : false);
form.render(); //更新全部