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copied!<p>When you call one of the callback registation functions likes <code>$(someElement).click(...)</code>, you are actually <em>adding</em> a handler for that event. If you call the function twice with the same, the handler gets called twice. Do demonstrate, try this html page (with jquery.js in the same page):</p> <pre><code><html> <head> <script src="jquery.js"></script> <script> function addhook() { $("div").click(function(e) { console.info("click!"); $("body").append($("<div>click!</div>")); return false; }); } $(function() { addhook(); $(window).resize(addhook); }); </script> </head> <body> <div><a href="#">Click me</a></div> </body> </html> </code></pre> <p>On first loading the page, it behaves as expected, but then after resizing the window, clicking "Click me" gets more than one "click!".</p> <p>The only reason you would have for re-registering a handler is if the respective elements have been destroyed and re-created.</p> <p>If this is happening, and it's not convenient to attempt to reliably re-register the handlers when necessary, consider using <a href="http://api.jquery.com/on/" rel="nofollow">delegated events</a> or <a href="http://api.jquery.com/live/" rel="nofollow">.live()</a>.</p> <p>Also note the <a href="http://api.jquery.com/off/" rel="nofollow">.off() function</a> which can remove all of the handlers on a set of elements.</p> <p>Lastly, you should probably change</p> <pre><code>jQuery.fn.responsive = function() { </code></pre> <p>to</p> <pre><code>jQuery.responsive = function() { </code></pre> <p>adding to <code>jQuery.fn</code> adds functions that can be called from jQuery objects, i.e. allowing, say,</p> <pre><code>$("div").responsive(); </code></pre> <p>For some reason these functions are also added to the <code>jQuery</code> object itself, so it still works, but the latter makes the function's purpose more clear and keeps the jQuery class clean.</p>

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