Optimising JQuery

Question

I'd like some tips on optimising the following code.

I'm a bit concerned that I'm 'polluting the global namespace' by not wrapping it in a function. The commented out 'var rotator { init {' came from a javascript tutorial but I'm not sure it's the JQuery way? Should I wrap it in $(function()... instead?

$(document).ready(function() {

//Promos rotation
var $accordionList = $('.accordion').find('li');

// var rotator = {
//      init: function() {
        var numberOfItems = $accordionList.length;
        var currentItem = 0;

        // Set first item to active
        $accordionList.eq(currentItem).addClass('active').find('.content').slideToggle(800, function() {});


        var infiniateLoop = setInterval(function() {

            if(currentItem == numberOfItems - 1){
                currentItem = 0;
            }
            else {
                currentItem++;
            }

            // Remove active class, if is has it, and close content
            $accordionList.parent().find('li.active').removeClass('active')
                .find('.content').slideToggle(800, function() {
            });

            // Add active class and open content
            $accordionList.eq(currentItem).addClass('active').find('.content').slideToggle(800, function() {
            });

        }, 4000 );

        //$('.accordion li').on('click', function () {
        $accordionList.on('click', function () {
            // Stop rotation
            clearInterval(infiniateLoop);

            var $accordionHead = $(this);

            // Remove active class, if is has it, and close content
            $accordionHead.parent().find('li.active').removeClass('active')
                .find('.content').slideToggle(800, function() {
            });

            // Add active class and open content
            $accordionHead.addClass('active').find('.content').slideToggle(800, function() {
            });
        });
//      }
// };

// rotator.init();

});

Any help and advice much appriciated