Switches from the class defined in the first argument to the class defined as second argument, using an optional transition.
$("p").click(function () { $(this).switchClass("highlight", "blue", 1000); });
<!DOCTYPE html> <html> <head> <link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script> <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script> <script src="http://ui.jquery.com/latest/ui/effects.core.js"></script> <style type="text/css"> p { margin: 4px; font-size:16px; font-weight:bolder; cursor:pointer; } .blue { background: blue; } .highlight { background:yellow; } </style> <script> $(document).ready(function() { $("p").click(function () { $(this).switchClass("highlight", "blue", 1000); }); }); </script> </head> <body style="font-size:62.5%;"> <p class="highlight">Click to switch</p> <p class="highlight">to blue</p> <p class="highlight">on these</p> <p class="highlight">paragraphs</p> </body> </html>