Hello.
There is such a table.

<form class="regular" method="post" action="" id="ask"> <table><tr> <td class="field-name"> Ваше Имя&nbsp;<span class="required">*</span></td> <td class="field-input"> <input type="text" name="name" class="form-text-input" value="" /> </td> </tr> <tr> <td class="field-name"> Индекс</td> <td class="field-input"> <input type="text" name="index_id" class="form-text-input" value="" /> </td> </tr> <tr> <td class="field-name"> Город</td> <td class="field-input"> <input type="text" name="city" class="form-text-input" value="" /> </td> </tr> <tr> <td class="field-name"> Ваш отзыв&nbsp;<span class="required">*</span></td> <td class="field-input"> <textarea style="height: 100px" id="textarea_review" name="review" class="form-textarea"></textarea> </td> </tr> <tr> <td class="field-name"> Email</td> <td class="field-input"> <input type="text" name="email" class="form-text-input" value="" /> </td> </tr> <tr> <td class="field-name"> Защита от спама&nbsp;<span class="required">*</span></td> <td class="field-input"> <img src="/extra/captcha-simple/" alt="" /> <input type="text" name="captcha" class="form-text-input" value="" /> </td> </tr> </table><p><span class="required">*</span>Обязательные для заполнения поля.</p><div class="form-buttons"><input value="Оставить отзыв" type="submit"/></div> </form>

I do not know to remove / add the display: none style for the second row of the table.

  <tr> <td class="field-name"> Индекс</td> <td class="field-input"> <input type="text" name="index_id" class="form-text-input" value="" /> </td> </tr>

I can only remove the field

 document.getElementsByName('index_id')[0].style.display="none";

The table is created dynamically - add id is not possible.

    1 answer 1

    you can get to the desired row of the table without id

     document.getElementById('ask').getElementsByTagName('tr')[1].style.display="none";

    here the index is hidden