 <p>It is not included in core of <a href="http://jquery.com" rel="nofollow">jQuery</a>, it come with a plugin called <a href="http://www.bvbcode.com/code/82iamsqt-867838" rel="nofollow">ajaxQueue</a>. mode:abort, abort all current ajax request, optional you can use a port to limit which group you are aborting. Code example with <a href="http://bassistance.de/jquery-plugins/jquery-plugin-autocomplete/" rel="nofollow">jQuery autocomplete</a> plugin:</p> <pre><code>$.ajax({ // try to leverage ajaxQueue plugin to abort previous requests mode: "abort", // limit abortion to this input port: "autocomplete" + input.name, .... </code></pre>