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POchanging <select> options using jquery .change function
 

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  1. POchanging <select> options using jquery .change function
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    <p>I'm facing this problem for more than 3 hours as I'm a still learning javascript and jquery.. I want to change select options based on user's choice from the same select input.. I don't know how to explain well but see this <a href="http://jsfiddle.net/YKASE/" rel="nofollow">http://jsfiddle.net/YKASE/</a></p> <p>THE HTML:</p> <pre><code>&lt;select name="test" class="select" id="test" multiple="multiple" style="width: 100%;"&gt; &lt;option value="1" class="first"&gt;1&lt;/option&gt; &lt;option value="2" class="first"&gt;2&lt;/option&gt; &lt;option value="3" class="first"&gt;3&lt;/option&gt; &lt;option value="a" id="1" class="hidden second"&gt;a&lt;/option&gt; &lt;option value="b" id="1" class="hidden second"&gt;b&lt;/option&gt; &lt;option value="c" id="1" class="hidden second"&gt;c&lt;/option&gt; &lt;option value="x" id="2" class="hidden second"&gt;x&lt;/option&gt; &lt;option value="y" id="2" class="hidden second"&gt;y&lt;/option&gt; &lt;option value="z" id="2" class="hidden second"&gt;z&lt;/option&gt; &lt;option value="baz" id="3" class="hidden second"&gt;baz&lt;/option&gt; &lt;option value="bar" id="3" class="hidden second"&gt;bar&lt;/option&gt; &lt;option value="foo" id="3" class="hidden second"&gt;foo&lt;/option&gt; &lt;/select&gt; </code></pre> <p>THE JS:</p> <pre><code>$("select#test").change(function () { $("#" + $(this).val()).removeClass("hidden"); $(".first").addClass("hidden"); }); </code></pre> <p>THE CSS:</p> <pre><code>.hidden { display: none; } </code></pre> <p>The problem is that only one option is shown but I want to show them all..</p>
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    1. CO**HTML does not permit duplicate element IDs.** Use classes instead.
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    2. COfirst problem is that you can't have multiple elements with same id ( you have 3 options with the same id "1")
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    3. COthanks.. I didn't notice that..
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