Question

我试图在相同的页面中使用相同的表单两次表单工作一次但不是两次我觉得问题是id或者其他什么但是我不确定我对javascript不是很好

帮助表示赞赏。

<!DOCTYPE html>
<html>
<head>

    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>


    <script>




    $(function () {
    $('#btnAdd').click(function () {
        var num     = $('.clonedInput').length, // Checks to see how many "duplicatable" input fields we currently have
            newNum  = new Number(num + 1),      // The numeric ID of the new input field being added, increasing by 1 each time
            newElem = $('#entry' + num).clone().attr('id', 'entry' + newNum).fadeIn('slow'); // create the new element via clone(), and manipulate it's ID using newNum value


        // H2 - section
        newElem.find('.heading-reference').attr('id', 'ID' + newNum + '_reference').attr('name', 'ID' + newNum + '_reference').html('Entry #' + newNum);

        // Title - select
        newElem.find('.label_ttl').attr('for', 'ID' + newNum + '_title');
        newElem.find('.select_ttl').attr('id', 'ID' + newNum + '_title').attr('name', 'ID' + newNum + '_title').val('');

        // First name - text
        newElem.find('.label_fn').attr('for', 'ID' + newNum + '_first_name');
        newElem.find('.input_fn').attr('id', 'ID' + newNum + '_first_name').attr('name', 'ID' + newNum + '_first_name').val('');




    // Insert the new element after the last "duplicatable" input field
        $('#entry' + num).after(newElem);
        $('#ID' + newNum + '_title').focus();

    // Enable the "remove" button. This only shows once you have a duplicated section.
        $('#btnDel').attr('disabled', false);

    // Right now you can only add 4 sections, for a total of 5. Change '5' below to the max number of sections you want to allow.
        if (newNum == 5)
        $('#btnAdd').attr('disabled', true).prop('value', "You've reached the limit"); // value here updates the text in the 'add' button when the limit is reached 
    });

    $('#btnDel').click(function () {
    // Confirmation dialog box. Works on all desktop browsers and iPhone.
        if (confirm("Are you sure you wish to remove this section? This cannot be undone."))
            {
                var num = $('.clonedInput').length;
                // how many "duplicatable" input fields we currently have
                $('#entry' + num).slideUp('slow', function () {$(this).remove();
                // if only one element remains, disable the "remove" button
                    if (num -1 === 1)
                $('#btnDel').attr('disabled', true);
                // enable the "add" button
                $('#btnAdd').attr('disabled', false).prop('value', "add section");});
            }
        return false; // Removes the last section you added
    });
    // Enable the "add" button
    $('#btnAdd').attr('disabled', false);
    // Disable the "remove" button
    $('#btnDel').attr('disabled', true);
});







    </script>
</head>

<body>
    <div id="wrapper">
    <div class="sign-up_box">
        <form action="#" method="post" id="sign-up_area">
            <div id="entry1" class="clonedInput">
                <h2 id="reference" name="reference" class="heading-reference">Entry #1</h2>


               <fieldset>
                    <label class="label_ln" for="last_name">Last name:</label>
                    <input class="input_ln" type="text" name="last_name" id="last_name" value="">
                </fieldset>

            </div><!-- end #entry1 -->

            <div id="addDelButtons">
                <input type="button" id="btnAdd" value="add section"> <input type="button" id="btnDel" value="remove section above">
            </div>





            <fieldset class="form-actions">
                <input type="submit" value="Submit">
            </fieldset>
        </form>
    </div><!-- end sign-up_box -->
  </div>







      <div id="wrapper">
    <div class="sign-up_box">
        <form action="#" method="post" id="sign-up_area">
            <div id="entry1" class="clonedInput">
                <h2 id="reference" name="reference" class="heading-reference">Entry #1</h2>


               <fieldset>
                    <label class="label_ln" for="last_name">Last name:</label>
                    <input class="input_ln" type="text" name="last_name" id="last_name" value="">
                </fieldset>

            </div><!-- end #entry1 -->

            <div id="addDelButtons">
                <input type="button" id="btnAdd" value="add section"> <input type="button" id="btnDel" value="remove section above">
            </div>





            <fieldset class="form-actions">
                <input type="submit" value="Submit">
            </fieldset>
        </form>
    </div><!-- end sign-up_box -->
  </div>







    </body>
</html>

Answer 1

您不能简单地克隆具有 id 属性的元素。任何单个页面上都不得有两个具有相同 id 的元素。因此，请相应地更改克隆元素的 id ，以及代码中对它们的引用。

Answer 2

Id标记在HTML文档中必须是唯一的，否则它们将无法正常工作。你可能想要“class”而不是“id”，并使用jQuery类选择器来选择合适的字段，具体取决于你想要做什么。

以下是与此相关的一些现有StackOverflow问题：

Using same ID for in multiple HTML tags?

Several elements with the same ID responding to one CSS ID selector

javascript duplication ID conflict

jQuery克隆表单在同一页面中没有工作两次

2 个答案: