$(function() {
    var SMALL_PHOTO = $("#thumbList img");
    var LARGE_PHOTO = $("#mainPhoto img");

    SMALL_PHOTO.eq(0).parent().addClass("current");

    SMALL_PHOTO.mouseover(
        function () {
            SMALL_PHOTO.parent().removeClass("current");
            $(this).parent().addClass("current");
            var NAME = $(this).attr("name");
            if(NAME){
                LARGE_PHOTO.attr("src",NAME);
            }
        }
    );
});