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POSelecting Parent Checkboxes
 

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    <p>I have a page that has a tree structure that has no limit to the number of levels it has. Each level has a tick box I need to be able to allow users to tick which levels they are interested in. If a user clicks on a level then all of the parent levels for that child need to be selected. Also if the parent check box is unticked then all child levels should be unticked.</p> <p>I tried writing the code below which kind of works however if I click the child it will tick the parent and grandparent but leave the child unselected. I am also unable to unselect items as every-time I select a box it always selects it again. </p> <p>I keep trying to make changes to the code and have ideas but I think I am going down the wrong direction and wanted to know if there are better solutions available for what I am trying to achieve. Here is the code:</p> <pre><code>&lt;!DOCTYPE HTML&gt; &lt;html&gt; &lt;head&gt; &lt;meta charset="utf-8"&gt; &lt;title&gt;Check Box&lt;/title&gt; &lt;script type="text/javascript" src="js/jquery.js"&gt;&lt;/script&gt; &lt;script language="javascript"&gt; $(document).ready(function () { $(".test").click(function (event) { event.preventDefault(); }); }); function set_checked(id, checked) { $("#ID_" + id).attr("checked", checked) alert(id); } function CheckMe(id) { var IDS = id.replace("ID_", ""); var IDS = IDS.split('_'); for (i = 0; i &lt; IDS.length; i++) { set_checked(IDS[i], true); } } &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;div&gt; &lt;form&gt; &lt;p&gt; &lt;input name="ID" type="checkbox" id="ID_123" value="123" onClick="CheckMe('ID_123')" class="test"&gt;Grandparent &lt;br&gt; &lt;input name="ID" type="checkbox" id="ID_124" value="124" onClick="CheckMe('ID_123_124')"class="test"&gt;Parent &lt;br&gt; &lt;input name="ID" type="checkbox" id="ID_125" value="125" onClick="CheckMe('ID_123_124_125')"class="test"&gt;Child &lt;/p&gt; &lt;p&gt; &lt;input type="submit" name="button" id="button" value="Submit"&gt; &lt;/p&gt; &lt;/form&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>I used jQuery <code>PreventDefault</code> to stop the default actions of the checkbox. I would be most grateful for any direction with this.</p> <p>Edit:</p> <p>Here are the options within an unordered list. My example above was misleading as it only had three options as I was trying to test clicking the bottom option and having the parent options clicked without considering that there would be multiple trees. </p> <pre><code>&lt;form action="" method="get" id="test"&gt; &lt;ul&gt; &lt;li&gt; &lt;input type="checkbox" name="ID" value="1"&gt; &lt;label&gt;Level 1&lt;/label&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="2"&gt;&lt;label&gt;Level 1.1&lt;/label&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="3"&gt;&lt;label&gt;Level 1.1.1&lt;/label&gt; &lt;/ul&gt; &lt;/ul&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="4"&gt;&lt;label&gt;Level 1.2&lt;/label&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="5"&gt;&lt;label&gt;Level 1.2.1&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="6"&gt;&lt;label&gt;Level 1.2.2&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="7"&gt;&lt;label&gt;Level 1.2.3&lt;/label&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="8"&gt;&lt;label&gt;Level 1.2.3.1&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="9"&gt;&lt;label&gt;Level 1.2.3.2&lt;/label&gt; &lt;/ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="10"&gt;&lt;label&gt;Level 1.2.4&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="11"&gt;&lt;label&gt;Level 1.2.5&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="12"&gt;&lt;label&gt;Level 1.2.6&lt;/label&gt; &lt;/ul&gt; &lt;/ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="13"&gt;&lt;label&gt;Level 2&lt;/label&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="14"&gt;&lt;label&gt;Level 2.1&lt;/label&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="15"&gt;&lt;label&gt;Level 2.1.1&lt;/label&gt; &lt;/ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="16"&gt;&lt;label&gt;Level 2.2&lt;/label&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="16"&gt;&lt;label&gt;Level 2.2.1&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="17"&gt;&lt;label&gt;Level 2.2.2&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="18"&gt;&lt;label&gt;Level 2.2.3&lt;/label&gt; &lt;ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="19"&gt;&lt;label&gt;Level 2.2.3.1&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="20"&gt;&lt;label&gt;Level 2.2.3.2&lt;/label&gt; &lt;/ul&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="21"&gt;&lt;label&gt;Level 2.2.4&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="22"&gt;&lt;label&gt;Level 2.2.5&lt;/label&gt; &lt;li&gt;&lt;input type="checkbox" name="ID" value="23"&gt;&lt;label&gt;Level 2.2.6&lt;/label&gt; &lt;/ul&gt; &lt;/ul&gt; &lt;/ul&gt; &lt;input name="Submit" type="submit" id="Button" value="Submit"&gt; &lt;/form&gt; </code></pre>
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