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    copied!<p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false"> <div class="snippet-code"> <pre class="snippet-code-js lang-js prettyprint-override"><code>$("#select1").change(function() { if ($(this).data('options') === undefined) { /*Taking an array of all options-2 and kind of embedding it on the select1*/ $(this).data('options', $('#select2 option').clone()); } var id = $(this).val(); var options = $(this).data('options').filter('[value=' + id + ']'); $('#select2').html(options); });</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"&gt;&lt;/script&gt; &lt;select name="select1" id="select1"&gt; &lt;option value="1"&gt;Fruit&lt;/option&gt; &lt;option value="2"&gt;Animal&lt;/option&gt; &lt;option value="3"&gt;Bird&lt;/option&gt; &lt;option value="4"&gt;Car&lt;/option&gt; &lt;/select&gt; &lt;select name="select2" id="select2"&gt; &lt;option value="1"&gt;Banana&lt;/option&gt; &lt;option value="1"&gt;Apple&lt;/option&gt; &lt;option value="1"&gt;Orange&lt;/option&gt; &lt;option value="2"&gt;Wolf&lt;/option&gt; &lt;option value="2"&gt;Fox&lt;/option&gt; &lt;option value="2"&gt;Bear&lt;/option&gt; &lt;option value="3"&gt;Eagle&lt;/option&gt; &lt;option value="3"&gt;Hawk&lt;/option&gt; &lt;option value="4"&gt;BWM&lt;option&gt; &lt;/select&gt;</code></pre> </div> </div> </p> <p>Using jQuery <a href="https://api.jquery.com/jquery.data/" rel="noreferrer">data()</a> to store data</p> <blockquote> <p>I guess hiding elements doesn't work cross-browser(2012), I have'nt tested it myself.</p> </blockquote>
 

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