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前のドロップダウン選択に基づいて2番目のドロップダウンを表示する

最初に、すでに対処済みの問題を取り上げるのは嫌いですが、このサイトで見つけた他のオプションが役に立たないことを知っておく必要があります。

基本的に、2つのドロップダウンボックスがある短いフォームを作成します。最初は常に表示され、2番目はデフォルトで非表示になっています。最初のドロップダウンボックスで特定のオプションが選択されている場合、2番目のドロップダウンボックスを表示する必要があります。これは私が言っていることの完璧な例です：

http://jsfiddle.net/whkQw/20/

ただし、上記の例とは異なり、オプションの1つだけではなく、最初のドロップダウンボックスで選択された各オプションのドロップダウンボックスに表示する個別のオプションセットがあります。つまり、上記の例では、「China」を選択すると2番目のドロップダウンボックスが表示されますが、それ以外を選択すると非表示のままになります。それは私が望むものではありません。 「台湾」を選択した場合は別のドロップダウンを表示し、各オプションで「ドイツ」などを選択した場合は別のドロップダウンを表示します。私は単純に各オプションのその例のjavascriptを複製し、それに応じて名前タグを変更しようとしましたが、うまくいきませんでした（Javascriptに関しては初心者です）。

だから私はこの例を見つけましたが、まさに私が探しているものです：

http://jsfiddle.net/e9XvP/

しかし、何らかの理由で、このコードは私には機能しないようです。まったく効果がありません。 2番目のドロップダウンは、選択内容に関係なく単に非表示のままになります。私のドロップダウンリストは、上記の例のリストよりもはるかに多く、長くなっています。ここに私が今持っているHTMLがあります：

ドロップダウン1

<div class="ccms_form_element cfdiv_custom" id="style_container_div">
<label>Choose Rank: </label><select size="1" id="Rank" class=" validate['required']" title="" type="select" name="Rank">
    <option value="">-Select Your Rank-</option>
    <option value="Airman">Airman</option>
    <option value="Airman First Class">Airman First Class</option>
    <option value="Senior Airman">Senior Airman</option>
    <option value="Staff Sergeant">Staff Sergeant</option>
    <option value="Senior Master Sergeant">Senior Master Sergeant</option>
</select><div class="clear"></div><div id="error-message-style"></div></div>

ドロップダウン2：

<div id="Airman"  class="style-sub-1"  style="display: none;" name="stylesub1" onchange="ChangeDropdowns(this.value)">
  <label>Which Job? </label>
    <select id="Airman" name="Airman">
      <option value="">-Choose A Job-</option>
      <option value="Basic Ore Miner - Level 1a">Basic Ore Miner - Level 1</option>
      <option value="Basic Ore Miner - Level 2a">Basic Ore Miner - Level 2</option>
      <option value="Basic Ore Miner - Level 3a">Basic Ore Miner - Level 3</option>
      <option value="Basic Ore Miner - Level 4a">Basic Ore Miner - Level 4</option>
      <option value="Basic Ore Miner - Level 5a">Basic Ore Miner - Level 5</option>
      <option value="Basic Ore Miner - Level 6a">Basic Ore Miner - Level 6</option>
      <option value="Basic Ore Miner - Level 7a">Basic Ore Miner - Level 7</option>
      <option value="Plagioclase Miner - Level 1a">Plagioclase Miner - Level 1</option>
      <option value="Plagioclase Miner - Level 2a">Plagioclase Miner - Level 2</option>
      <option value="Plagioclase Miner - Level 3a">Plagioclase Miner - Level 3</option>
      <option value="Plagioclase Miner - Level 4a">Plagioclase Miner - Level 4</option>
      <option value="Plagioclase Miner - Level 5a">Plagioclase Miner - Level 5</option>
      <option value="Plagioclase Miner - Level 6a">Plagioclase Miner - Level 6</option>
      <option value="Plagioclase Miner - Level 7a">Plagioclase Miner - Level 7</option>
      <option value="Omber Miner - Level 1a">Omber Miner - Level 1</option>
      <option value="Omber Miner - Level 2a">Omber Miner - Level 2</option>
      <option value="Omber Miner - Level 3a">Omber Miner - Level 3</option>
      <option value="Omber Miner - Level 4a">Omber Miner - Level 4</option>
      <option value="Omber Miner - Level 5a">Omber Miner - Level 5</option>
      <option value="Omber Miner - Level 6a">Omber Miner - Level 6</option>
      <option value="Omber Miner - Level 7a">Omber Miner - Level 7</option>
      <option value="lvl-1 Mission Runner - Level 1a">lvl-1 Mission Runner - Level 1</option>
      <option value="lvl-1 Mission Runner - Level 2a">lvl-1 Mission Runner - Level 2</option>
      <option value="lvl-1 Mission Runner - Level 3a">lvl-1 Mission Runner - Level 3</option>
      <option value="lvl-1 Mission Runner - Level 4a">lvl-1 Mission Runner - Level 4</option>
      <option value="lvl-1 Mission Runner - Level 5a">lvl-1 Mission Runner - Level 5</option>
      <option value="lvl-1 Mission Runner - Level 6a">lvl-1 Mission Runner - Level 6</option>
      <option value="lvl-1 Mission Runner - Level 7a">lvl-1 Mission Runner - Level 7</option>
      <option value="lvl-2 Mission Runner - Level 1a">lvl-2 Mission Runner - Level 1</option>
      <option value="lvl-2 Mission Runner - Level 2a">lvl-2 Mission Runner - Level 2</option>
      <option value="lvl-2 Mission Runner - Level 3a">lvl-2 Mission Runner - Level 3</option>
      <option value="lvl-2 Mission Runner - Level 4a">lvl-2 Mission Runner - Level 4</option>
      <option value="lvl-2 Mission Runner - Level 5a">lvl-2 Mission Runner - Level 5</option>
      <option value="lvl-2 Mission Runner - Level 6a">lvl-2 Mission Runner - Level 6</option>
      <option value="lvl-2 Mission Runner - Level 7a">lvl-2 Mission Runner - Level 7</option>
      <option value="lvl-3 Mission Runner - Level 1a">lvl-3 Mission Runner - Level 1</option>
      <option value="lvl-3 Mission Runner - Level 2a">lvl-3 Mission Runner - Level 2</option>
      <option value="lvl-3 Mission Runner - Level 3a">lvl-3 Mission Runner - Level 3</option>
      <option value="lvl-3 Mission Runner - Level 4a">lvl-3 Mission Runner - Level 4</option>
      <option value="lvl-3 Mission Runner - Level 5a">lvl-3 Mission Runner - Level 5</option>
      <option value="lvl-3 Mission Runner - Level 6a">lvl-3 Mission Runner - Level 6</option>
      <option value="lvl-3 Mission Runner - Level 7a">lvl-3 Mission Runner - Level 7</option>
      <option value="lvl-4 Mission Runner - Level 1a">lvl-4 Mission Runner - Level 1</option>
      <option value="lvl-4 Mission Runner - Level 2a">lvl-4 Mission Runner - Level 2</option>
      <option value="lvl-4 Mission Runner - Level 3a">lvl-4 Mission Runner - Level 3</option>
      <option value="lvl-4 Mission Runner - Level 4a">lvl-4 Mission Runner - Level 4</option>
      <option value="lvl-4 Mission Runner - Level 5a">lvl-4 Mission Runner - Level 5</option>
      <option value="lvl-4 Mission Runner - Level 6a">lvl-4 Mission Runner - Level 6</option>
      <option value="lvl-4 Mission Runner - Level 7a">lvl-4 Mission Runner - Level 7</option>
    </select>
</div>
<div id="Airman First Class"  class="style-sub-1"  style="display: none;" name="stylesub1" onchange="ChangeDropdowns(this.value)">
  <label>Which Job? </label>
    <select id="Airman First Class" name="Airman First Class">
    <option value="">-Choose A Job-</option>
      <option value="Basic Ore Miner - Level 1b">Basic Ore Miner - Level 1</option>
      <option value="Basic Ore Miner - Level 2b">Basic Ore Miner - Level 2</option>
      <option value="Basic Ore Miner - Level 3b">Basic Ore Miner - Level 3</option>
      <option value="Basic Ore Miner - Level 4b">Basic Ore Miner - Level 4</option>
      <option value="Basic Ore Miner - Level 5b">Basic Ore Miner - Level 5</option>
      <option value="Basic Ore Miner - Level 6b">Basic Ore Miner - Level 6</option>
      <option value="Basic Ore Miner - Level 7b">Basic Ore Miner - Level 7</option>
      <option value="Plagioclase Miner - Level 1b">Plagioclase Miner - Level 1</option>
      <option value="Plagioclase Miner - Level 2b">Plagioclase Miner - Level 2</option>
      <option value="Plagioclase Miner - Level 3b">Plagioclase Miner - Level 3</option>
      <option value="Plagioclase Miner - Level 4b">Plagioclase Miner - Level 4</option>
      <option value="Plagioclase Miner - Level 5b">Plagioclase Miner - Level 5</option>
      <option value="Plagioclase Miner - Level 6b">Plagioclase Miner - Level 6</option>
      <option value="Plagioclase Miner - Level 7b">Plagioclase Miner - Level 7</option>
      <option value="Omber Miner - Level 1b">Omber Miner - Level 1</option>  
      <option value="Omber Miner - Level 2b">Omber Miner - Level 2</option>
      <option value="Omber Miner - Level 3b">Omber Miner - Level 3</option>
      <option value="Omber Miner - Level 4b">Omber Miner - Level 4</option>
      <option value="Omber Miner - Level 5b">Omber Miner - Level 5</option>
      <option value="Omber Miner - Level 6b">Omber Miner - Level 6</option>
      <option value="Omber Miner - Level 7b">Omber Miner - Level 7</option>
      <option value="lvl-1 Mission Runner - Level 1b">lvl-1 Mission Runner - Level 1</option>
      <option value="lvl-1 Mission Runner - Level 2b">lvl-1 Mission Runner - Level 2</option>
      <option value="lvl-1 Mission Runner - Level 3b">lvl-1 Mission Runner - Level 3</option>
      <option value="lvl-1 Mission Runner - Level 4b">lvl-1 Mission Runner - Level 4</option>
      <option value="lvl-1 Mission Runner - Level 5b">lvl-1 Mission Runner - Level 5</option>
      <option value="lvl-1 Mission Runner - Level 6b">lvl-1 Mission Runner - Level 6</option>
      <option value="lvl-1 Mission Runner - Level 7b">lvl-1 Mission Runner - Level 7</option>
      <option value="lvl-2 Mission Runner - Level 1b">lvl-2 Mission Runner - Level 1</option>
       <option value="lvl-2 Mission Runner - Level 2b">lvl-2 Mission Runner - Level 2</option>
       <option value="lvl-2 Mission Runner - Level 3b">lvl-2 Mission Runner - Level 3</option>
       <option value="lvl-2 Mission Runner - Level 4b">lvl-2 Mission Runner - Level 4</option>
       <option value="lvl-2 Mission Runner - Level 5b">lvl-2 Mission Runner - Level 5</option>
       <option value="lvl-2 Mission Runner - Level 6b">lvl-2 Mission Runner - Level 6</option>
       <option value="lvl-2 Mission Runner - Level 7b">lvl-2 Mission Runner - Level 7</option>
      <option value="lvl-3 Mission Runner - Level 1b">lvl-3 Mission Runner - Level 1</option>
       <option value="lvl-3 Mission Runner - Level 2b">lvl-3 Mission Runner - Level 2</option>
       <option value="lvl-3 Mission Runner - Level 3b">lvl-3 Mission Runner - Level 3</option>
       <option value="lvl-3 Mission Runner - Level 4b">lvl-3 Mission Runner - Level 4</option>
       <option value="lvl-3 Mission Runner - Level 5b">lvl-3 Mission Runner - Level 5</option>
       <option value="lvl-3 Mission Runner - Level 6b">lvl-3 Mission Runner - Level 6</option>
       <option value="lvl-3 Mission Runner - Level 7b">lvl-3 Mission Runner - Level 7</option>
      <option value="lvl-4 Mission Runner - Level 1b">lvl-4 Mission Runner - Level 1</option>
       <option value="lvl-4 Mission Runner - Level 2b">lvl-4 Mission Runner - Level 2</option>
       <option value="lvl-4 Mission Runner - Level 3b">lvl-4 Mission Runner - Level 3</option>
       <option value="lvl-4 Mission Runner - Level 4b">lvl-4 Mission Runner - Level 4</option>
       <option value="lvl-4 Mission Runner - Level 5b">lvl-4 Mission Runner - Level 5</option>
       <option value="lvl-4 Mission Runner - Level 6b">lvl-4 Mission Runner - Level 6</option>
       <option value="lvl-4 Mission Runner - Level 7b">lvl-4 Mission Runner - Level 7</option>
    </select>
</div>
<div id="Senior Airman"  class="style-sub-1"  style="display: none;" name="stylesub1" onchange="ChangeDropdowns(this.value)">
  <label>Which Job? </label>
    <select id="Senior Airman" name="Senior Airman">
    <option value="">-Choose A Job-</option>
      <option value="Basic Ore Miner - Level 1c">Basic Ore Miner - Level 1</option>
       <option value="Basic Ore Miner - Level 2c">Basic Ore Miner - Level 2</option>
       <option value="Basic Ore Miner - Level 3c">Basic Ore Miner - Level 3</option>
       <option value="Basic Ore Miner - Level 4c">Basic Ore Miner - Level 4</option>
       <option value="Basic Ore Miner - Level 5c">Basic Ore Miner - Level 5</option>
       <option value="Basic Ore Miner - Level 6c">Basic Ore Miner - Level 6</option>
       <option value="Basic Ore Miner - Level 7c">Basic Ore Miner - Level 7</option>
       <option value="Plagioclase Miner - Level 1c">Plagioclase Miner - Level 1</option>
       <option value="Plagioclase Miner - Level 2c">Plagioclase Miner - Level 2</option>
       <option value="Plagioclase Miner - Level 3c">Plagioclase Miner - Level 3</option>
       <option value="Plagioclase Miner - Level 4c">Plagioclase Miner - Level 4</option>
       <option value="Plagioclase Miner - Level 5c">Plagioclase Miner - Level 5</option>
       <option value="Plagioclase Miner - Level 6c">Plagioclase Miner - Level 6</option>
       <option value="Plagioclase Miner - Level 7c">Plagioclase Miner - Level 7</option>
       <option value="Omber Miner - Level 1c">Omber Miner - Level 1</option>  
       <option value="Omber Miner - Level 2c">Omber Miner - Level 2</option>
       <option value="Omber Miner - Level 3c">Omber Miner - Level 3</option>
       <option value="Omber Miner - Level 4c">Omber Miner - Level 4</option>
       <option value="Omber Miner - Level 5c">Omber Miner - Level 5</option>
       <option value="Omber Miner - Level 6c">Omber Miner - Level 6</option>
       <option value="Omber Miner - Level 7c">Omber Miner - Level 7</option>
       <option value="lvl-1 Mission Runner - Level 1c">lvl-1 Mission Runner - Level 1</option>
       <option value="lvl-1 Mission Runner - Level 2c">lvl-1 Mission Runner - Level 2</option>
       <option value="lvl-1 Mission Runner - Level 3c">lvl-1 Mission Runner - Level 3</option>
       <option value="lvl-1 Mission Runner - Level 4c">lvl-1 Mission Runner - Level 4</option>
       <option value="lvl-1 Mission Runner - Level 5c">lvl-1 Mission Runner - Level 5</option>
       <option value="lvl-1 Mission Runner - Level 6c">lvl-1 Mission Runner - Level 6</option>
       <option value="lvl-1 Mission Runner - Level 7c">lvl-1 Mission Runner - Level 7</option>
       <option value="lvl-2 Mission Runner - Level 1c">lvl-2 Mission Runner - Level 1</option>
       <option value="lvl-2 Mission Runner - Level 2c">lvl-2 Mission Runner - Level 2</option>
       <option value="lvl-2 Mission Runner - Level 3c">lvl-2 Mission Runner - Level 3</option>
       <option value="lvl-2 Mission Runner - Level 4c">lvl-2 Mission Runner - Level 4</option>
       <option value="lvl-2 Mission Runner - Level 5c">lvl-2 Mission Runner - Level 5</option>
       <option value="lvl-2 Mission Runner - Level 6c">lvl-2 Mission Runner - Level 6</option>
       <option value="lvl-2 Mission Runner - Level 7c">lvl-2 Mission Runner - Level 7</option>
       <option value="lvl-3 Mission Runner - Level 1c">lvl-3 Mission Runner - Level 1</option>
       <option value="lvl-3 Mission Runner - Level 2c">lvl-3 Mission Runner - Level 2</option>
       <option value="lvl-3 Mission Runner - Level 3c">lvl-3 Mission Runner - Level 3</option>
       <option value="lvl-3 Mission Runner - Level 4c">lvl-3 Mission Runner - Level 4</option>
       <option value="lvl-3 Mission Runner - Level 5c">lvl-3 Mission Runner - Level 5</option>
       <option value="lvl-3 Mission Runner - Level 6c">lvl-3 Mission Runner - Level 6</option>
       <option value="lvl-3 Mission Runner - Level 7c">lvl-3 Mission Runner - Level 7</option>
       <option value="lvl-4 Mission Runner - Level 1c">lvl-4 Mission Runner - Level 1</option>
       <option value="lvl-4 Mission Runner - Level 2c">lvl-4 Mission Runner - Level 2</option>
       <option value="lvl-4 Mission Runner - Level 3c">lvl-4 Mission Runner - Level 3</option>
       <option value="lvl-4 Mission Runner - Level 4c">lvl-4 Mission Runner - Level 4</option>
       <option value="lvl-4 Mission Runner - Level 5c">lvl-4 Mission Runner - Level 5</option>
       <option value="lvl-4 Mission Runner - Level 6c">lvl-4 Mission Runner - Level 6</option>
       <option value="lvl-4 Mission Runner - Level 7c">lvl-4 Mission Runner - Level 7</option>
    </select>
</div>
<div id="Staff Sergeant"  class="style-sub-1"  style="display: none;" name="stylesub1" onchange="ChangeDropdowns(this.value)">
  <label>Which Job? </label>
    <select id="Staff Sergeant" name="Staff Sergeant">
    <option value="">-Choose A Job-</option>
      <option value="Basic Ore Miner - Level 1d">Basic Ore Miner - Level 1</option>
       <option value="Basic Ore Miner - Level 2d">Basic Ore Miner - Level 2</option>
       <option value="Basic Ore Miner - Level 3d">Basic Ore Miner - Level 3</option>
       <option value="Basic Ore Miner - Level 4d">Basic Ore Miner - Level 4</option>
       <option value="Basic Ore Miner - Level 5d">Basic Ore Miner - Level 5</option>
       <option value="Basic Ore Miner - Level 6d">Basic Ore Miner - Level 6</option>
       <option value="Basic Ore Miner - Level 7d">Basic Ore Miner - Level 7</option>
       <option value="Plagioclase Miner - Level 1d">Plagioclase Miner - Level 1</option>
       <option value="Plagioclase Miner - Level 2d">Plagioclase Miner - Level 2</option>
       <option value="Plagioclase Miner - Level 3d">Plagioclase Miner - Level 3</option>
       <option value="Plagioclase Miner - Level 4d">Plagioclase Miner - Level 4</option>
       <option value="Plagioclase Miner - Level 5d">Plagioclase Miner - Level 5</option>
       <option value="Plagioclase Miner - Level 6d">Plagioclase Miner - Level 6</option>
       <option value="Plagioclase Miner - Level 7d">Plagioclase Miner - Level 7</option>
       <option value="Omber Miner - Level 1d">Omber Miner - Level 1</option>  
       <option value="Omber Miner - Level 2d">Omber Miner - Level 2</option>
       <option value="Omber Miner - Level 3d">Omber Miner - Level 3</option>
       <option value="Omber Miner - Level 4d">Omber Miner - Level 4</option>
       <option value="Omber Miner - Level 5d">Omber Miner - Level 5</option>
       <option value="Omber Miner - Level 6d">Omber Miner - Level 6</option>
       <option value="Omber Miner - Level 7d">Omber Miner - Level 7</option>
      <option value="lvl-1 Mission Runner - Level 1d">lvl-1 Mission Runner - Level 1</option>
      <option value="lvl-1 Mission Runner - Level 2d">lvl-1 Mission Runner - Level 2</option>
      <option value="lvl-1 Mission Runner - Level 3d">lvl-1 Mission Runner - Level 3</option>
      <option value="lvl-1 Mission Runner - Level 4d">lvl-1 Mission Runner - Level 4</option>
      <option value="lvl-1 Mission Runner - Level 5d">lvl-1 Mission Runner - Level 5</option>
      <option value="lvl-1 Mission Runner - Level 6d">lvl-1 Mission Runner - Level 6</option>
      <option value="lvl-1 Mission Runner - Level 7d">lvl-1 Mission Runner - Level 7</option>
      <option value="lvl-2 Mission Runner - Level 1d">lvl-2 Mission Runner - Level 1</option>
       <option value="lvl-2 Mission Runner - Level 2d">lvl-2 Mission Runner - Level 2</option>
       <option value="lvl-2 Mission Runner - Level 3d">lvl-2 Mission Runner - Level 3</option>
       <option value="lvl-2 Mission Runner - Level 4d">lvl-2 Mission Runner - Level 4</option>
       <option value="lvl-2 Mission Runner - Level 5d">lvl-2 Mission Runner - Level 5</option>
       <option value="lvl-2 Mission Runner - Level 6d">lvl-2 Mission Runner - Level 6</option>
       <option value="lvl-2 Mission Runner - Level 7d">lvl-2 Mission Runner - Level 7</option>
      <option value="lvl-3 Mission Runner - Level 1d">lvl-3 Mission Runner - Level 1</option>
       <option value="lvl-3 Mission Runner - Level 2d">lvl-3 Mission Runner - Level 2</option>
       <option value="lvl-3 Mission Runner - Level 3d">lvl-3 Mission Runner - Level 3</option>
       <option value="lvl-3 Mission Runner - Level 4d">lvl-3 Mission Runner - Level 4</option>
       <option value="lvl-3 Mission Runner - Level 5d">lvl-3 Mission Runner - Level 5</option>
       <option value="lvl-3 Mission Runner - Level 6d">lvl-3 Mission Runner - Level 6</option>
       <option value="lvl-3 Mission Runner - Level 7d">lvl-3 Mission Runner - Level 7</option>
      <option value="lvl-4 Mission Runner - Level 1d">lvl-4 Mission Runner - Level 1</option>
       <option value="lvl-4 Mission Runner - Level 2d">lvl-4 Mission Runner - Level 2</option>
       <option value="lvl-4 Mission Runner - Level 3d">lvl-4 Mission Runner - Level 3</option>
       <option value="lvl-4 Mission Runner - Level 4d">lvl-4 Mission Runner - Level 4</option>
       <option value="lvl-4 Mission Runner - Level 5d">lvl-4 Mission Runner - Level 5</option>
       <option value="lvl-4 Mission Runner - Level 6d">lvl-4 Mission Runner - Level 6</option>
       <option value="lvl-4 Mission Runner - Level 7d">lvl-4 Mission Runner - Level 7</option>
    </select>
</div>
<div id="Senior Master Sergeant"  class="style-sub-1"  style="display: none;" name="stylesub1" onchange="ChangeDropdowns(this.value)">
  <label>Which Job? </label>
    <select id="Senior Master Sergeant" name="Senior Master Sergeant">
    <option value="">-Choose A Job-</option>
      <option value="Basic Ore Miner - Level 1e">Basic Ore Miner - Level 1</option>
       <option value="Basic Ore Miner - Level 2e">Basic Ore Miner - Level 2</option>
       <option value="Basic Ore Miner - Level 3e">Basic Ore Miner - Level 3</option>
       <option value="Basic Ore Miner - Level 4e">Basic Ore Miner - Level 4</option>
       <option value="Basic Ore Miner - Level 5e">Basic Ore Miner - Level 5</option>
       <option value="Basic Ore Miner - Level 6e">Basic Ore Miner - Level 6</option>
       <option value="Basic Ore Miner - Level 7e">Basic Ore Miner - Level 7</option>
       <option value="Plagioclase Miner - Level 1e">Plagioclase Miner - Level 1</option>
       <option value="Plagioclase Miner - Level 2e">Plagioclase Miner - Level 2</option>
       <option value="Plagioclase Miner - Level 3e">Plagioclase Miner - Level 3</option>
       <option value="Plagioclase Miner - Level 4e">Plagioclase Miner - Level 4</option>
       <option value="Plagioclase Miner - Level 5e">Plagioclase Miner - Level 5</option>
       <option value="Plagioclase Miner - Level 6e">Plagioclase Miner - Level 6</option>
       <option value="Plagioclase Miner - Level 7e">Plagioclase Miner - Level 7</option>
       <option value="Omber Miner - Level 1e">Omber Miner - Level 1</option>  
       <option value="Omber Miner - Level 2e">Omber Miner - Level 2</option>
       <option value="Omber Miner - Level 3e">Omber Miner - Level 3</option>
       <option value="Omber Miner - Level 4e">Omber Miner - Level 4</option>
       <option value="Omber Miner - Level 5e">Omber Miner - Level 5</option>
       <option value="Omber Miner - Level 6e">Omber Miner - Level 6</option>
       <option value="Omber Miner - Level 7e">Omber Miner - Level 7</option>
      <option value="lvl-1 Mission Runner - Level 1e">lvl-1 Mission Runner - Level 1</option>
      <option value="lvl-1 Mission Runner - Level 2e">lvl-1 Mission Runner - Level 2</option>
      <option value="lvl-1 Mission Runner - Level 3e">lvl-1 Mission Runner - Level 3</option>
      <option value="lvl-1 Mission Runner - Level 4e">lvl-1 Mission Runner - Level 4</option>
      <option value="lvl-1 Mission Runner - Level 5e">lvl-1 Mission Runner - Level 5</option>
      <option value="lvl-1 Mission Runner - Level 6e">lvl-1 Mission Runner - Level 6</option>
      <option value="lvl-1 Mission Runner - Level 7e">lvl-1 Mission Runner - Level 7</option>
      <option value="lvl-2 Mission Runner - Level 1e">lvl-2 Mission Runner - Level 1</option>
       <option value="lvl-2 Mission Runner - Level 2e">lvl-2 Mission Runner - Level 2</option>
       <option value="lvl-2 Mission Runner - Level 3e">lvl-2 Mission Runner - Level 3</option>
       <option value="lvl-2 Mission Runner - Level 4e">lvl-2 Mission Runner - Level 4</option>
       <option value="lvl-2 Mission Runner - Level 5e">lvl-2 Mission Runner - Level 5</option>
       <option value="lvl-2 Mission Runner - Level 6e">lvl-2 Mission Runner - Level 6</option>
       <option value="lvl-2 Mission Runner - Level 7e">lvl-2 Mission Runner - Level 7</option>
      <option value="lvl-3 Mission Runner - Level 1e">lvl-3 Mission Runner - Level 1</option>
       <option value="lvl-3 Mission Runner - Level 2e">lvl-3 Mission Runner - Level 2</option>
       <option value="lvl-3 Mission Runner - Level 3e">lvl-3 Mission Runner - Level 3</option>
       <option value="lvl-3 Mission Runner - Level 4e">lvl-3 Mission Runner - Level 4</option>
       <option value="lvl-3 Mission Runner - Level 5e">lvl-3 Mission Runner - Level 5</option>
       <option value="lvl-3 Mission Runner - Level 6e">lvl-3 Mission Runner - Level 6</option>
       <option value="lvl-3 Mission Runner - Level 7e">lvl-3 Mission Runner - Level 7</option>
      <option value="lvl-4 Mission Runner - Level 1e">lvl-4 Mission Runner - Level 1</option>
       <option value="lvl-4 Mission Runner - Level 2e">lvl-4 Mission Runner - Level 2</option>
       <option value="lvl-4 Mission Runner - Level 3e">lvl-4 Mission Runner - Level 3</option>
       <option value="lvl-4 Mission Runner - Level 4e">lvl-4 Mission Runner - Level 4</option>
       <option value="lvl-4 Mission Runner - Level 5e">lvl-4 Mission Runner - Level 5</option>
       <option value="lvl-4 Mission Runner - Level 6e">lvl-4 Mission Runner - Level 6</option>
       <option value="lvl-4 Mission Runner - Level 7e">lvl-4 Mission Runner - Level 7</option>
    </select>
</div>
        <div class="clear"></div><div id="error-message-style-sub-1"></div></div>

私が述べたように、上記の例のjavascriptコードはどちらも機能していません。また、javascriptにはまったく慣れていません（HTMLの経験も豊富ではありません）。

さらに、ユーザーが2番目のドロップダウンボックスで選択を行ったら、ドロップダウンボックスの下に一意のテキスト行（つまり、選択に固有の行）を表示する必要があります。ここに私が見つけた例があります：

特定のドロップダウンオプションが選択/選択解除されたときに非表示のdivを切り替えます

ただし、この例とは異なり、テキストを表示するオプションは1つだけではありません。選択したすべてのオプションに対して異なる行のテキストを表示したい。この例のコードを変更して、それを機能させるにはどうすればよいですか？

私はこれが大きなプロジェクトになる可能性が高いことを知っていますので、コードを変更して、ただ一つのオプション。おそらくこの投稿のサイズから推測できるように、私は長文を書くことに非常に満足しています。

どんな助けでも大歓迎です。

前もって感謝します。

javascriptcsshtmldrop-down-menu
18
Scott

いずれにせよ、あなたはすでに仕事に使用するのにおそらく最も簡単なHTMLマークアップであるものになっています：

<select size="1" id="Rank" title="" name="Rank">
    <option value="">-Select Your Rank-</option>
    <option value="Airman">Airman</option>
    <option value="Airman First Class">Airman First Class</option>
    <option value="Senior Airman">Senior Airman</option>
    <option value="Staff Sergeant">Staff Sergeant</option>
    <option value="Senior Master Sergeant">Senior Master Sergeant</option>
</select>

<element>の可能性ごとに1つの<option>コンテナ。

<div>
    // For Airman
</div>
<div>
    // For Senior Airman
</div>

...などなど...

どの<option>が選択されているかに依存するすべてのものに、この同じレイアウトを使用します。必要な一意のテキスト行、その他の選択ボックスなど。各要素をコンテナ要素にラップするので、すべての要素を1つの要素として簡単にターゲットにできます。

<div class="container">
    <div>
        Line of text for Airman
    </div>
    <div>
        Line of text for Senior Airman
    </div>
</div>

<div class="container">
    <div>
        <select>
            <option>Airman Stuff</option>
        </select>
    </div>
    <div>
        <select>
            <option>Senior Airman Stuff</option>
        </select>
    </div>
</div>

今、私たちが持っている<div>のそれぞれの識別子を強打して、 "Airman"が選択されたとき、どの<div>がAirmanであるかを知る（だからそれらを表示することを知っている！）

<div class="container">
    <div class="airman">
        Line of text for Airman
    </div>
    <div class="senior-airman">
        Line of text for Senior Airman
    </div>
</div>

<div class="container">
    <div class="airman">
        <select>
            <option>Airman Stuff</option>
        </select>
    </div>
    <div class="senior-airman">
        <select>
            <option>Senior Airman Stuff</option>
        </select>
    </div>
</div>

<options>の<select id="rank">に同じ識別子を追加します。

<select size="1" id="Rank" title="" name="Rank">
    <option value="">-Select Your Rank-</option>
    <option value="airman">Airman</option>
    <option value="senior-airman">Senior Airman</option>
</select>

これで、このマークアップができました。JavaScriptを非表示/表示に適用すると、so !!

$(document).ready(function () {
    $('#Rank').bind('change', function () {
        var elements = $('div.container').children().hide(); // hide all the elements
        var value = $(this).val();

        if (value.length) { // if somethings' selected
            elements.filter('.' + value).show(); // show the ones we want
        }
    }).trigger('change'); // Setup the initial states
});

完了;例のチェックアウト： http://jsfiddle.net/3UWk2/1/

コメントの更新

あなたがやったようにコードを変更しようとしてもうまくいかなかったのは、現在、第2レベルの<select>ボックスにバインドされたイベントハンドラーがないためです。 <select id="rank">のみ

基本的に、第1レベルのnav、第2レベルのnavで行ったすべてを繰り返す必要があります。 #idに<select>セレクターを使用する代わりに、.classを使用します。ターゲットにする<select>要素が複数あり、#idが一意である必要があるためです。

$('.second-level-select').bind('change', function () {
    var elements = $('div.second-level-container').children().hide(); // hide all the elements
    var value = $(this).val();

    if (value.length) { // if somethings' selected
        elements.filter('.' + value).show(); // show the ones we want
    }
}).trigger('change'); // Setup the initial states

また、div.containerの名前を変更して、互いの要素を非表示にする<select>ボックスを停止する必要がありました。

ここで更新された例をチェックしてください： http://jsfiddle.net/3UWk2/3/

16
Matt

うわー、それは多くのコードです...しかし、実際にはjQueryでそれを行うのは本当に簡単でした（それがオプションの場合）。 例 を参照してください。

最初に行う必要があるのは、IDのスペースを削除することです。それは一般的に悪いです。次に、選択リスト内のこれらの値に基づいて、idとしてそれらを渡すだけで表示/非表示を行います。

JQuery（ただし、jQueryリンクを含めることを忘れないでください）：

$("#Rank").change(function(){
   correspondingID = $(this).find(":selected").val()
   $(".style-sub-1").hide();
   $("#" + correspondingID).show();
})
8
Joseph Marikle

私の解決策とアドバイスは、AJAXを使用することです。多くのオプションがあり、他の多くのオプションごとに、それらすべてを即座にロードしても意味がありません。 AJAXリクエストを送信し、2番目の選択を適切なオプションで更新します。また、各オプションの適切なテキストをデータベースに保存することもできます。ユーザーに不要な選択をダウンロードさせることはありません

3
mkk

最初にhtmlコードを含める

 <!-------first dropdown----------->
    <select name="make" id="elements">
      <option value="">-</option>
      <option value="Satec" >Satec</option>
      <option data-val='m2' value="Masibus" >Masibus</option>
      <option data-val='m3' value="Pyrotech" >Pyrotech</option>
       <option data-val='m4' value="Schneider" >Schneider</option>

    </select>

    <!---------second dropdown---------->
    <select name="model" id="category">
      <option value="">-</option>
      <option value="PM130" >PM130</option>
      <option value="PM2160A" >PM2160A</option>
      <option value="MFM101" >MFM101</option>
       <option value="ABC" >ABC</option>
    </select>

インクルードjsスクリプト

<script>
var category = document.getElementById('category');
document.getElementById('elements').onchange = function() {
  var optionSelected = this.options[this.selectedIndex];
  if (optionSelected.textContent != '-') {
    if (optionSelected.dataset.val === 'm2') {
      category.value = 'PM2160A';
    }
    else if (optionSelected.dataset.val === 'm3')  {
    category.value='MFM101';
}
    else if (optionSelected.dataset.val === 'm4')  {
    category.value='ABC';
}
    else {
      category.value = 'PM130';
    }
  } else {
    category.value = '';
  }
}
</script>

確実に機能します。

2
Deshal Kh