(function($) {

    $.fn.easySlider = function(options) {

        // default configuration properties
        var defaults = {
            prevId: 'prevBtn',
            prevText: '<img src="easySlider/geri.png" />',
            nextId: 'nextBtn',
            nextText: '<img src="easySlider/ileri.png" />',
            orientation: '', //  'vertical' is optional;
            speed: 500
        };

        var options = $.extend(defaults, options);

        return this.each(function() {
            obj = $(this);
            var s = $("li", obj).length;
            var w = obj.width();
            var h = obj.height();
            var ts = s - 1;
            var t = 0;
            var vertical = (options.orientation == 'vertical');
            $("ul", obj).css('width', s * w);
            if (!vertical) $("li", obj).css('float', 'left');
            $(obj).after('<span id="' + options.prevId + '"><a href=\"javascript:void(0);\">' + options.prevText + '</a></span> <span id="' + options.nextId + '"><a href=\"javascript:void(0);\">' + options.nextText + '</a></span>');
            $("a", "#" + options.prevId).hide();
            $("a", "#" + options.nextId).hide();
            $("a", "#" + options.nextId).click(function() {
                animate("next");
                if (t >= ts) $(this).fadeOut();
                $("a", "#" + options.prevId).fadeIn();
            });
            $("a", "#" + options.prevId).click(function() {
                animate("prev");
                if (t <= 0) $(this).fadeOut();
                $("a", "#" + options.nextId).fadeIn();
            });
            function animate(dir) {
                if (dir == "next") {
                    t = (t >= ts) ? ts : t + 1;
                } else {
                    t = (t <= 0) ? 0 : t - 1;
                };
                if (!vertical) {
                    p = (t * w * -1);
                    $("ul", obj).animate(
						{ marginLeft: p },
						options.speed
					);
                } else {
                    p = (t * h * -1);
                    $("ul", obj).animate(
						{ marginTop: p },
						options.speed
					);
                }
            };
            if (s > 1) $("a", "#" + options.nextId).fadeIn();
        });

    };

})(jQuery);