(function($) {
    $.fn.easySlider = function(options) {
        var defaults = {
            prevId: 'prevBtn',
            prevText: 'Previous',
            nextId: 'nextBtn',
            nextText: 'Next',
            controlsShow: true,
            controlsBefore: '',
            controlsAfter: '',
            controlsFade: true,
            firstId: 'firstBtn',
            firstText: 'First',
            firstShow: false,
            lastId: 'lastBtn',
            lastText: 'Last',
            lastShow: false,
            vertical: false,
            speed: 800,
            auto: false,
            pause: 2000,
            continuous: false
        };
        var options = $.extend(defaults, options);
        this.each(function() {
            var obj = $(this);
            var s = $("li", obj).length;
            var w = $("li", obj).width();
            var h = $("li", obj).height();
            obj.width(w);
            obj.height(h);
            obj.css("overflow", "hidden");
            var ts = s - 1;
            var t = 0;
            $("ul", obj).css('width', s * w);
            if (!options.vertical) $("li", obj).css('float', 'left');

            if (options.controlsShow) {
                var html = options.controlsBefore;
                if (options.firstShow) html += ' &nbsp; <span id="' + options.firstId + '"><a href=\"javascript:void(0);\">' + options.firstText + '</a> &nbsp; </span>';
                html += ' &nbsp; <span id="' + options.prevId + '"><a href=\"javascript:void(0);\">' + options.prevText + '</a> &nbsp; </span>';
                html += ' &nbsp; <span id="' + options.nextId + '"><a href=\"javascript:void(0);\">' + options.nextText + '</a> &nbsp; </span>';
                if (options.lastShow) html += ' &nbsp; <span id="' + options.lastId + '"><a href=\"javascript:void(0);\">' + options.lastText + '</a> &nbsp; </span>';
                html += options.controlsAfter;
                $(obj).after(html);
            };
            $("a", "#" + options.nextId).click(function() {
                animate("next", true);
            });
            $("a", "#" + options.prevId).click(function() {
                animate("prev", true);
            });
            $("a", "#" + options.firstId).click(function() {
                animate("first", true);
            });
            $("a", "#" + options.lastId).click(function() {
                animate("last", true);
            });
            function animate(dir, clicked) {
                var ot = t;
                switch (dir) {
                case "next":
                    t = (ot >= ts) ? (options.continuous ? 0 : ts) : t + 1;
                    break;
                case "prev":
                    t = (t <= 0) ? (options.continuous ? ts: 0) : t - 1;
                    break;
                case "first":
                    t = 0;
                    break;
                case "last":
                    t = ts;
                    break;
                default:
                    break;
                };
                var diff = Math.abs(ot - t);
                var speed = diff * options.speed;
                if (!options.vertical) {
                    p = (t * w * -1);
                    $("ul", obj).animate({
                        marginLeft: p
                    },
                    speed);
                } else {
                    p = (t * h * -1);
                    $("ul", obj).animate({
                        marginTop: p
                    },
                    speed);
                };
                if (!options.continuous && options.controlsFade) {
                    if (t == ts) {
                        $("a", "#" + options.nextId).hide();
                        $("a", "#" + options.lastId).hide();
                    } else {
                        $("a", "#" + options.nextId).show();
                        $("a", "#" + options.lastId).show();
                    };
                    if (t == 0) {
                        $("a", "#" + options.prevId).hide();
                        $("a", "#" + options.firstId).hide();
                    } else {
                        $("a", "#" + options.prevId).show();
                        $("a", "#" + options.firstId).show();
                    };
                };
                if (clicked) clearTimeout(timeout);
                if (options.auto && dir == "next" && !clicked) {;
                    timeout = setTimeout(function() {
                        animate("next", false);
                    },
                    diff * options.speed + options.pause);
                };
            };
            var timeout;
            if (options.auto) {;
                timeout = setTimeout(function() {
                    animate("next", false);
                },
                options.pause);
            };
            if (!options.continuous && options.controlsFade) {
                $("a", "#" + options.prevId).hide();
                $("a", "#" + options.firstId).hide();
            };
        });
    };
})(jQuery);