(function($) {
$.fn.extend({
        FocusImg: function(obj) {
            var Default = {};
            var div = $(this);

            var focusImg = $("a", div);
            $("a:not(:first-child)", focusImg).hide();
            var count = focusImg.length;
            var index = 1;
            setInterval(function() {

                var lastImg = $(focusImg[index == 0 ? count - 1 : index - 1]);
                lastImg.fadeOut(1000);
                var currImg = $(focusImg[index]);
                currImg.fadeIn(1000);

                index++;
                if (index >= count) {
                    index = 0;
                }
            }, 3000);
        }
    })
})(jQuery)