Question

我有一个选择项目的HTML列表。有一个值名称：其他，如果选中，我想显示文本输入。

以下是我的代码。如果用户选择除other以外的任何选项，则应隐藏文本输入。当用户从选择中选择other时，如何显示此文本字段。

<td>
    Interest <span style="color:#F00;">*</span>
</td>
<td>
    <select name="interest" id="travel_arriveVia" onchange="showfield(this.options[this.selectedIndex].value)">
        <option value="art" <?php if ($g_interest=="art" ) echo 'selected = "selected"'; ?>>Art</option>
        <option value="litteratures" <?php if ($g_interest=="litteratures" ) echo 'selected = "selected"'; ?>>Litteratures</option>
        <option value="business" <?php if($g_interest=="business" ) echo 'selected = "selected"'; ?>>Business</option>
        <option value="internet" <?php if($g_interest=="internet" ) echo 'selected = "selected"'; ?>>Internet</option>
        <option value="other_interest" <?php if($g_interest=="internet" ) echo 'selected = "selected"'; ?>>Other</option>
    </select>

    <script type="text/javascript">
        function showfield(name) {
            if (name == 'other_interest') document.getElementById('div1').innerHTML = '<input type="text" name="other_interest" class="trother" />';
            else document.getElementById('div1').innerHTML = '';
        }
    </script>
    <div id="div1"></div>
</td>

感谢。

Answer 1

您可以执行以下操作，而不是div1：

<select name="interest" id="travel_arriveVia" onchange="showfield(this.options[this.selectedIndex].value)">
        <option value="art" <?php if ($g_interest=="art" ) echo 'selected = "selected"'; ?>>Art</option>
        <option value="litteratures" <?php if ($g_interest=="litteratures" ) echo 'selected = "selected"'; ?>>Litteratures</option>
        <option value="business" <?php if($g_interest=="business" ) echo 'selected = "selected"'; ?>>Business</option>
        <option value="internet" <?php if($g_interest=="internet" ) echo 'selected = "selected"'; ?>>Internet</option>
        <option value="other_interest" <?php if($g_interest=="internet" ) echo 'selected = "selected"'; ?>>Other</option>
</select>

<input type="text" name="other_interest" id="txtOther" class="trother" style="display: none;" />

<script>
  function showfield(name) {
        if (name == 'other_interest') document.getElementById('txtOther').style = 'display: block;';
        else document.getElementById('txtOther').style = 'display: none;';
    }
</script>

Answer 2

保持文本输入，但只在更改选择时显示和隐藏它。

<select name="interest" id="travel_arriveVia" onchange="showfield(this.options[this.selectedIndex].value)">
    <option value="art" <?php if ($g_interest=="art" ) echo 'selected = "selected"'; ?>>Art</option>
    <option value="litteratures" <?php if ($g_interest=="litteratures" ) echo 'selected = "selected"'; ?>>Litteratures</option>
    <option value="business" <?php if($g_interest=="business" ) echo 'selected = "selected"'; ?>>Business</option>
    <option value="internet" <?php if($g_interest=="internet" ) echo 'selected = "selected"'; ?>>Internet</option>
    <option value="other_interest" <?php if($g_interest=="other_interest" ) echo 'selected = "selected"'; ?>>Other</option>
</select>

<input type="text" id="other_interest" name="other_interest" class="trother" style="<?php if($g_interest != 'other_interest') echo 'display:none;'; ?>" />

<script type="text/javascript">
    function showfield(name) {

        var input = document.getElementById("other_interest");
        if (name == 'other_interest') {
            input.style.display = "";
        } else {
            input.style.display = "none";
        }
    }
</script>

选择Html可选框问题

2 个答案: