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    <blockquote> <p>I have 3 buttons with same id ...</p> </blockquote> <p>You have invalid HTML, you can't have more than one element in a page with the same <code>id</code>.</p> <p><a href="http://www.w3.org/TR/html401/struct/global.html#h-7.5.2">Quoting the spec</a>: </p> <blockquote> <p><em>7.5.2 <strong>Element identifiers: the id and class attributes</em></strong> </p> <p><strong>id = name [CS]</strong><br> This attribute assigns a name to an element. This name must be unique in a document.</p> </blockquote> <p><strong>Solution</strong>: change from <code>id</code> to <code>class</code>,</p> <pre><code>&lt;button type="button" class="btn btn-primary xyz" value="1"&gt;XYZ1&lt;/button&gt; &lt;button type="button" class="btn btn-primary xyz" value="2"&gt;XYZ2&lt;/button&gt; &lt;button type="button" class="btn btn-primary xyz" value="3"&gt;XYZ3&lt;/button&gt; </code></pre> <p>And the <strong>jQuery code</strong>:</p> <pre><code>$(".xyz").click(function(){ alert(this.value); // No need for jQuery :$(this).val() to get the value of the input. }); </code></pre> <blockquote> <p>But it works only for the first button</p> </blockquote> <p>jQuery <code>#id</code> selector <a href="http://api.jquery.com/id-selector/">docs</a>:</p> <blockquote> <p>Each id value must be used only once within a document. <strong>If more than one element has been assigned the same ID, queries that use that ID will only select the first matched element in the DOM.</strong> This behavior should not be relied on, however; a document with more than one element using the same ID is invalid.</p> </blockquote> <p>If you look at the jQuery source you can see when you call <code>$</code> with an id selecor-(<code>$("#id")</code>), jQuery calls the native javascript <code>document.getElementById</code> function:</p> <pre><code>// HANDLE: $("#id") } else { elem = document.getElementById( match[2] ); } </code></pre> <p>Though, in the <a href="http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-getElBId">spec</a> of <code>document.getElementById</code> they didn't mention it must return the first value, this is how most of (maybe all?) the browsers implemented it.</p> <p><strong><a href="http://jsfiddle.net/CAnxW/">DEMO</a></strong></p>
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    1. POjQuery id selector works only for the first element
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    1. COAnd its a home run with a complete answer! ++1
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    2. COThanks, i have try it and it works, but with alert(this).val(); Now i have problem with my button css class, as you see, there is two class in button tag
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    3. COI have modified my class to: class="btn btn-primary xyz" Thanks for you, it is really helpful Mafaik
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