$.fn.switchSize = function(settings) { // defaults settings settings = $.extend({     container: 'body',     arrSizeClass: ['small', 'medium', 'large'],     defaultClass: 'medium',     saveCookie: true }, settings); var $container = $(settings.container); return this     .each(function() {         if ($.cookie('switchSize')) {         $container.addClass($.cookie('switchSize'));         $(this).data("current", $.cookie('switchSize'))         }     })     .bind("click", function() {         var pos;         if ($(this).data("current")) {         pos = jQuery.inArray($(this).data("current"), settings.arrSizeClass);         } else {         pos = jQuery.inArray(settings.defaultClass, settings.arrSizeClass);         }         if (pos >= 0) { //Found Class         if (pos == settings.arrSizeClass.length - 1) { //Check if last             $(this).data("current", settings.arrSizeClass[0]);         } else {             $(this).data("current", settings.arrSizeClass[pos + 1]);         }         } else {         //To prevent error         $(this).data("current", settings.arrSizeClass[0]);         }           $container.removeClass(settings.arrSizeClass[pos]).addClass($(this).data("current"));           if (settings.saveCookie === true) {         $.cookie('switchSize', $(this).data("current"), { expires: 365, path: '/' });         }     }); };