(function($) {

    $.fn.easySlider = function(options) {

        // default configuration properties
        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: 0,
            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 += '<span id="' + options.firstId + '"><a href=\"javascript:void(0);\">' + options.firstText + '</a></span>';
                html += ' <span id="' + options.prevId + '"><a id=\"btnPrevA\" jump=\"-1\" href=\"javascript:void(0);\">' + options.prevText + '</a></span>';
                html += ' <span id="' + options.nextId + '"><a id=\"btnNextA\" jump=\"-1\" href=\"javascript:void(1);\">' + options.nextText + '</a></span>';
                if (options.lastShow) html += ' <span id="' + options.lastId + '"><a href=\"javascript:void(0);\">' + options.lastText + '</a></span>';
                html += options.controlsAfter;
                $(obj).after(html);
            };

 
            $("a", "#" + options.nextId).click(function() {
                if (this.getAttribute('jump')!="-1") {
                    jump("next",this.getAttribute('jump'));
                } else {
                    animate("next", true);
                };
                this.setAttribute("jump","-1");
                return;
            });
            
            $("a", "#" + options.prevId).click(function() {
                if (this.getAttribute('jump')!="-1") {
                    jump("prev",this.getAttribute('jump'));
                } else {
                    animate("prev", true);
                };
                this.setAttribute("jump","-1");
            });
            $("a", "#" + options.firstId).click(function() {
                animate("first", true);

            });
            $("a", "#" + options.lastId).click(function() {
                animate("last", true);
            });
         
         function jump(dir,amount) {
              //alert('in jump');
            p = (amount * w * -1);
            $("ul", obj).animate(
			    { marginLeft: p },
				0
				);
              
            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;
                default:
                    break;
            };
            
            if (amount == ts) {
                $("a", "#" + options.nextId).hide();
                $("a", "#" + options.lastId).hide();
            } else {
                $("a", "#" + options.nextId).show();
                $("a", "#" + options.lastId).show();
            };
            if (amount == 0) {
                $("a", "#" + options.prevId).hide();
                $("a", "#" + options.firstId).hide();
            } else {
                $("a", "#" + options.prevId).show();
                $("a", "#" + options.firstId).show();
            };
            
            t=parseFloat(amount);
             window.location.hash=amount;
         }
         
            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);
                };

            };
            // init
            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);