var image_group;

function display_box(person) {
    image_group.stop(true, true);
    image_group.fadeOut("fast");
    image_group.filter("."+person).fadeIn("fast");
}

$(document).ready(function () {
    image_group = $(".boxes img", "#people_section");

    $(".activators div", "#people_section").hover(
        function () { display_box($(this).attr("name")); },
        function () { image_group.fadeOut("fast"); }
    );
});