从下拉菜单中选择选项组合以生成结果

时间:2014-04-08 19:55:05

标签: javascript html text drop-down-menu phpmyadmin

我设法通过从下拉列表中选择一个选项来生成一段文字。可以在此处找到Javascript代码:

<script type="text/javascript">
        function ShowDiv() {
            safeToggleFieldDisplay(document.getElementById('one'), 'none');
            safeToggleFieldDisplay(document.getElementById('two'), 'none');
            safeToggleFieldDisplay(document.getElementById('three'), 'none');

            var dropdown = document.getElementById("ContentListBox");
            var index = dropdown.selectedIndex;
            var selectedDIV = dropdown.options[index].value;
            safeToggleFieldDisplay(document.getElementById(selectedDIV), 'flip');
        }

        function safeToggleFieldDisplay(field, sVisibility) {
            try {
                if ((field) && (field.style)) {
                    if (sVisibility == 'flip') {
                        if (field.style.display == 'none') {
                            sVisibility = 'block';
                        }
                        else {
                            sVisibility = 'none';
                        }
                    }
                    field.style.display = sVisibility;
                }
            }
            catch (exception) {
                //no handling - just preventing page explosions
            }
        }

下拉列表和示例内容的HTML代码如下:

 <select name="ContentListBox" id="ContentListBox" onchange="javascript:ShowDiv();">
                <option value="">Select Macronutrient</option>
                <option value="one">Protein</option>
                <option value="two">Carbohydrates</option>
                <option value="three">Fats</option>
            </select>
            <div id="one" style="display:none;"> <br>
                <img src="Protein.jpg" width="120" height="120" style="position: absolute; bottom: 15px; right: 30px;"/>
<b>About</b> <br>
➢   The most common macronutrient associated with fitness in general. <br>
➢   It repairs the body’s cells.<br>
➢   It forms many body structures, including muscles, skin, and hair.<br>
➢   It maintains and replaces tissues in your body.<br>
➢   It manufactures red blood cells to carry oxygen.<br>
➢   It manufactures antibodies to fight diseases<br>
<b>Examples</b><br>
➢   Lean meat and fish<br>
➢   Eggs and dairy<br>
➢   Beans, nuts, and seeds<br>
➢   Whey, soy, and plant protein supplements<br>

</div>

我的问题是,我是否可以使用多个下拉列表中选定选项的组合来输出特定文本。例如,用户可以从以下每个下拉列表中选择一个选项,然后单击“生成”按钮。生成一个特定于他们选择的选项组合的锻炼计划:

<div class="margins1">
<h2>Goal</h2>
<select name = "goalDrop"> 
<option>Fat Loss</option>
<option>Lean Muscle</option>
<option>Size & Mass</option>
</select>
<h2>Current Level</h2>
<select name = "levelDrop"> 
<option>Beginner</option>
<option>Intermediate</option>
<option>Advanced</option>
                                                                                    </select>
                                                                                    <h2>Gym Accessibility</h2>                                                                      <select name = "gymDrop"> 
    <option>Access to Gym</option>
    <option>No Access to Gym</option>
    </select>

    <h2>Days Per Week</h2>                                                                      <select name = "weekDrop"> 
    <option>3-Day Split</option>
    <option>4-Day Split</option>
    <option>5-Day Split</option>
    </select></br>
    </div>

    <div id="generateworkoutplan"> 
    <form action=>
    <input type="submit" value="Generate" >
    </form>
    </div>

我一直在尝试扩展我现有的解决方案以实现这一目标,但这已经非常混乱了。任何人都可以告诉我最好的方法来提供这个/或提供某种代码结构?请注意,我也使用phpmyadmin,所以我也欢迎任何包含此问题的解决方案。另请注意,在阅读我的代码片段时,您可能必须向右滚动(由于某种原因,它没有正确格式化/缩进)。

非常感谢你的时间。

1 个答案:

答案 0 :(得分:0)

我会使用与三个下拉列表的连续选择相对应的ID。

伪码:

targetID = selectionA + selectionB + selectionC

因此,如果您的选择值为&#34; AAB&#34;,则应展示ID为&#34; AAB&#34;的DIV。给它们所有相同的类名,按类名隐藏它们,然后显示与ID对应的那个。

<div id="AAB" class="info">...</div>