根据前一个下拉选择显示第二个下拉列表
Show a second dropdown based on previous dropdown selection
首先，我讨厌提出一个已经处理过的问题，但是你应该知道我在这个网站上找到的其他选择对我不起作用。
基本上，我想构造一个有两个下拉框的简短表单。第一个总是显示，第二个默认情况下是隐藏的。当第一个下拉框中的某个选项被选中时，我希望显示第二个下拉框。这是我想表达的一个完美的例子:
http://jsfiddle.net/whkQw/20/然而，与上面的例子不同的是，对于第一个下拉框中选择的每个选项，我都有一个单独的选项集要在下拉框中显示，而不仅仅是其中一个选项。换句话说，在上面的例子中，如果你选择"China"，第二个下拉框将出现，但如果你选择其他任何东西，它将保持隐藏。那不是我想要的。我想要一个不同的下拉显示，如果你选择"台湾"，但不同的下拉显示，如果你选择"德国"，等等每个选项。我试图简单地复制javascript在这个例子中的每个选项，改变相应的名称标签，但没有工作(我是一个新手，当它涉及到javascript)。
所以我遇到了这个例子，这正是我正在寻找的东西:
http://jsfiddle.net/e9XvP/然而，由于某些原因，这段代码似乎不适合我。它没有任何作用;无论选择什么，第二个下拉菜单都保持隐藏。我的下拉列表比上面的例子要多得多，也更长。这是我现在的HTML:
1下拉
<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>
下拉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>
正如我所说的，上面两个例子中的javascript代码都不适合我，我对javascript很陌生(也不是HTML经验丰富)，所以有什么建议吗?
此外，一旦用户在第二个下拉框中进行选择，我希望在下拉框下方显示唯一的文本行(即唯一的选择)。下面是我找到的一个例子:
当一个特定的下拉选项被选中/取消选中时，切换一个隐藏的div
然而，与这个例子不同的是，我不希望只有一个选项来显示文本;我想要一个不同的文本行显示任何和每一个选择。我该如何修改本例中的代码以使其工作呢?
我知道这可能是一个很大的项目，所以如果你能给我一个我必须做的修改代码的示例，那么它将影响不止一个选项，那么不要担心为我输入所有内容。从这篇文章的大小你大概可以猜到，我对自己写得很长很舒服。
任何帮助都将非常感激。
提前感谢。
无论如何，您已经完成了可能是最容易用于该工作的HTML标记:
<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>
然后一个<element>容器对应每种可能的<option>。
<div>
// For Airman
</div>
<div>
// For Senior Airman
</div>
…等等…
我将使用相同的布局，一切取决于哪个<option>被选中;你想要的唯一文本行，其他选择框等等。我将每个元素包装在一个容器元素中，这样您就可以轻松地将所有元素作为一个元素。
<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>
现在给我们得到的每个<div>打一个标识符，所以当"Airman"被选中时，我们知道哪些<div>是Airmans(所以我们知道要显示那些!)
<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>
并在<select id="rank">的<options> 's中添加相同的标识符:
<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>
$(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
});
;查看示例:http://jsfiddle.net/3UWk2/1/
你的评论的更新
你试图改变代码的原因是你没有工作，因为我们目前没有事件处理程序绑定到第二级<select>盒子;only to <select id="rank">
你需要基本上重复我们刚刚为第一级导航所做的一切，为第二级导航。而不是使用#id选择器<select>，使用.class;因为我们有多个<select>元素作为目标，而#id必须是唯一的:
$('.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
我们还必须更改div.container的名称，以阻止<select>框隐藏彼此的元素。
查看这里的更新示例:http://jsfiddle.net/3UWk2/3/
哇，这是很多代码…但实际上用jQuery很容易做到(如果有的话)。请看我的例子。
你需要做的第一件事是删除id中的空格。这通常是不好的。其次，你只是显示/隐藏基于这些值在选择列表传递它们作为id。
jQuery(不要忘记包含jQuery链接):
$("#Rank").change(function(){
correspondingID = $(this).find(":selected").val()
$(".style-sub-1").hide();
$("#" + correspondingID).show();
})
我的解决方案和建议是使用AJAX。如果你有很多选项，并且每个选项都有很多其他选项，那么立即加载它们是没有意义的。其思想是发送一个AJAX请求，并用适当的选项更新第二个选择。您还可以在数据库中为每个选项存储适当的文本。这样，你就有了你想要的一切，你不强迫用户下载不必要的选择
首先包含HTML代码
<!-------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>
after include js script
<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>
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