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    <p>You are trying to initialize the jQuery plugin on an element that does not exist yet. I think it is important to understand what is going wrong, so you can avoid this problem in the future, since this is a very common pattern you're using.</p> <p>We'll look at your code, starting with this bit...</p> <pre><code> $(function() { $( "#accordion" ).accordion(); }); </code></pre> <p>...which is executed immediately, as the page loads. Since there is no element with the id <code>accordion</code> at that moment, nothing happens (check your console -- probably have an error).</p> <p>Then, you have the <code>onchange</code> code on the input element, which uses non-jQuery ajax to send a request on to your php file. The php file generates some html, wrapped in a div with the id <code>accordion</code>, and adds it to the page. That element has never had the accordion-related javascript applied to it, and thus sits there with no functionality.</p> <p>You've got some of the concepts right, but your timing is wrong. First of all, let's use the jQuery ajax method to simply that code. Also, since you're already paying a performance/load time cost to include jQuery in your project, you should take full advantage of the functionality and use the utility element selector as well:</p> <p><strong>The new javascript</strong></p> <pre><code>(function ($) { // used to keep a reference to the ajax request object var searchQuery = false; var showUser = function (str) { if (searchQuery != false) // if there is a pending request, cancel it searchQuery.abort(); var searchTerm = $('#matr').val(); if (searchTerm .trim().length &lt; 1) { $("#txtHint").html(''); return; } // clean up the old accordion if ($("#accordion").length &gt; 0) $("#accordion").accordion('destroy'); $("#txtHint").html('seaching...'); searchQuery = $.ajax({ 'url':'http://IP/file_name/test.php?q='+searchTerm, 'success':function (response) { searchQuery = false; $('#txtHint').html(response); $('#accordion').accordion(); }, 'error': function () { searchQuery = false; $('#txtHint').html('Sorry, there was an error'); } }); }; // add the change event to the text field, once the page loads $(document).ready(function () { $('#matr').change(showUser); }); })(jQuery); </code></pre> <p><strong>The HTML</strong></p> <p>The only change required to the HTML is that you remove the inline <code>onClick</code> event from the input. That said, you are using <code>center</code> to center text, which is not a good practice. Use css <code>text-align:center;</code> instead -- the less tags, the better (generally speaking).</p> <p><strong>The PHP</strong></p> <p>Nothing needs to change here, but be certain you are correctly treating the user input that you're getting from <code>$_GET</code>. Using <code>mysqli_*</code> alone does not protect against SQL injection, if you don't use it correctly. We don't see that code here, so consider this a standard disclaimer: <strong>never trust user input</strong>!</p> <p><strong>Documentation</strong></p> <ul> <li><code>jQuery.ajax</code> - <a href="http://api.jquery.com/jQuery.ajax/" rel="nofollow">http://api.jquery.com/jQuery.ajax/</a></li> <li>jQuery UI Accordion widget - <a href="http://jqueryui.com/accordion/" rel="nofollow">http://jqueryui.com/accordion/</a></li> </ul>
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    1. USChris Baker
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    1. COin the new javascript , where is the xmlhttprequest to the php file ?
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    2. COI have an error in that line : if (str.trim().length < 1) {
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    3. COit says Uncaught type error : Object#<object>has no method trim
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