(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:			2000,
			continuous:		false,
			numeric: 		false,
			numericId: 		'controls'
		};

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

		this.each(function() {
			var obj = $(this);
			var s = $("li", obj).length;
			var w = $("li", obj).width()+26;
			var h = $("li", obj).height();
			var clickable = true;
			obj.css("overflow","hidden");
			var ts = s-1;
            if(ts<3) options.controlsShow=false;
			var t = 0;
			$("ul", obj).css('width',s*w);


			if(options.continuous){
				$("ul", obj).prepend($("ul li:last-child", obj).clone().css("margin-left","-"+ w +"px"));
				$("ul", obj).append($("ul li:nth-child(2)", obj).clone());
				$("ul", obj).css('width',(s+0)*w);
			};

			if(!options.vertical) $("li", obj).css('float','left');

			if(options.controlsShow){
				var html = options.controlsBefore;
                html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';
                html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>';
				html += options.controlsAfter;
				$(obj).after(html);
			};

			if(!options.numeric){
				$("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 setCurrent(i){
				i = parseInt(i)+1;
				$("li", "#" + options.numericId).removeClass("current");
				$("li#" + options.numericId + i).addClass("current");
			};

			function adjust(){
				if(t>ts-2) t=0;
				if(t<0) t=ts;
				if(!options.vertical) {
					$("ul",obj).css("margin-left",(t*w*-1));
				} else {
					$("ul",obj).css("margin-left",(t*h*-1));
				}
				clickable = true;
				if(options.numeric) setCurrent(t);
			};

			function animate(dir,clicked){
				if (clickable){
					clickable = false;
					var ot = t;
					switch(dir){
						case "next":
							t = (ot>=ts) ? (options.continuous ? t+1 : ts) : t+1;
							break;
						case "prev":
							t = (t<=0) ? (options.continuous ? t-1 : 0) : t-1;
							break;
						default:
							t = dir;
							break;
					};
					var diff = Math.abs(ot-t);
					var speed = diff*options.speed;
					if(!options.vertical) {
						p = (t*w*-1);
						$("ul",obj).animate(
							{ marginLeft: p },
							{ queue:false, duration:speed, complete:adjust }
						);
					}

                    if(t+2==ts){
                        $("#nextBtn").hide();
                        $("#nextBtn").hide();
                    } else {
                        $("#nextBtn").show();
                        $("#nextBtn").show();
                    };

                    if(t==0){
                        $("a","#prevBtn").hide();
                        $("a","#prevBtn").hide();
                    } else {
                        $("a","#prevBtn").show();
                        $("a","#prevBtn").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.numeric) setCurrent(0);

			if(!options.continuous && options.controlsFade){
				$("a","#"+options.prevId).hide();
				$("a","#"+options.firstId).hide();
			};

		});

	};

})(jQuery);