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    <p>You can use <code>setTimeout</code> to <em>debounce</em> the event:</p> <pre><code>$('#checkout .arrows div').live('click',function(){ var $this = $(this), data = $this.data(), $item = $(this).parent().prev('input'); if(data['debounce_timer']) { clearTimeout(data['debounce_timer']); } $item.val(function(i, value) { return +value + $this.hasClass('more') ? 1 : -1; }); // Maybe you have to store a reference to the quantity (value) here. // Otherwise you might get strange results when the arrow was just // clicked again when the callback is executed. var timer = setTimeout(function() { $.ajax({ type: 'POST', url: '/backend/product_purchase_items.php', data: {qty: $item.val(), item_id: $item.attr('item_id')} cache: false, success: function(data) { $('#product_purchase_items').html(data); } }); }, 150); // &lt;-- try different times data['debounce_timer'] = timer; }); </code></pre> <p><strong>Things that changed/should be considered:</strong></p> <ul> <li><p>Caching <code>$(this).parent().prev('input')</code> in a variable to not traverse the DOM every time to find the <em>same</em> element <em>again</em>.</p></li> <li><p>Passing a function to <a href="http://api.jquery.com/val/" rel="nofollow noreferrer"><code>.val()</code> <em><sup>[docs]</sup></em></a> and update the value "in one go".</p></li> <li><p>Using unary <code>+</code> to convert a string to a number, instead of <code>parseInt</code>. If you use <code>parseInt</code>, you <em>have to</em> pass the radix as second parameter (in your case <code>10</code>), to prevent JS from <a href="https://stackoverflow.com/questions/850341/workarounds-for-javascript-parseint-octal-bug">interpreting numbers with leading zeroes as octal numbers</a>.</p></li> <li><p>Using <a href="http://api.jquery.com/hasClass/" rel="nofollow noreferrer"><code>.hasClass()</code> <em><sup>[docs]</sup></em></a> instead of comparing the <code>class</code> attribute. If the element has more than one class, the comparison will fail.</p></li> <li><p>Setting an <em>object</em> as value of the <code>data</code> option instead of a string. This ensures that the data is properly encoded.</p></li> <li><p>You really should use <a href="http://ejohn.org/blog/html-5-data-attributes/" rel="nofollow noreferrer"><em>HTML5 data attributes</em></a> instead of custom attributes (<code>item_id</code>). Even if the browser does not support HTML5 (yet), this is the safer way. With jQuery, you can even access them via the <code>.data()</code> method.</p></li> <li><p>Using <a href="https://developer.mozilla.org/en/window.setTimeout" rel="nofollow noreferrer"><code>setTimeout</code> <em><sup>[MDN]</sup></em></a> to delay the Ajax call and storing a reference to the timer ID in <a href="http://api.jquery.com/data/" rel="nofollow noreferrer"><code>.data()</code> <em><sup>[docs]</sup></em></a>. When the handler is rapidly executed, a previous timer will be cancelled with <a href="https://developer.mozilla.org/en/window.clearTimeout" rel="nofollow noreferrer"><code>clearTimeout</code> <em><sup>[MDN]</sup></em></a>, to prevent too many Ajax requests.</p></li> </ul>
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    1. POHow to make this jquery function more efficient?
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    1. USFelix Kling
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    1. COI am really grateful for all the other answers... but this one Felix is so great!! Firstly, html 5 data attr's - thank god... I can say bye to my hacks.. the other things I'm just sitting here studying for now trying to wrap my head around the new concepts. A lot of things I had no idea about. Thanks very much.
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    2. CO@KeenLearner: You're welcome :) Happy coding and learning!
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    3. COThanks again. I think there might be a little hitch I'm trying to debug as when I click more or less arrows I get '1' being the qty. Still wrapping my brain around this $item.val function you made. Its like a simplified if else statement with math rolled in one??
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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