$(document).ready(function(){

            // Hide all large images except the first one
            $('.imageContainer img').hide().filter(':first').show();
            $('.caption p').hide().filter(':first').show();          

            // Select all thumb links
            $('#thumbContainer a').hover(function(event) {

                    // Hide all large images except for the one with the same hash as our thumb link
                    $('.imageContainer img').hide().filter(this.hash).show();
                    $('.caption p').hide().filter(this.hash).show();
                },
                function () {} // Because the hover method has a mouseout state we need to define too
            );     
 });