(function($) {

	$.fn.swSlider = function(options){
	  
		var defaults = {
			prevId: 		'prevBtn',
			prevText: 		'Previous',
			nextId: 		'nextBtn',
			nextText: 		'Next',
			controlsShow:	true,
			controlsBefore:	'',
			controlsAfter:	'',
			controlsFade:	true,
			firstId: 		'firstBtn',
			firstText: 		'',
			firstShow:		true,
			lastId: 		'lastBtn',	
			lastText: 		'',
			lastShow:		true,				
			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*2);
			obj.height(h);
			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;
				html += ' <span id="'+ options.firstId +'"><a href=\"javascript:void(0);\">'+ options.firstText +'</a></span>';
				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(){
				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-1;
						break; 
					default:
						break; 
				};	

				var diff = Math.abs(ot-t);
				var speed = diff*options.speed;						
				if(!options.vertical) {
					p = (t*w*-1);
					//alert(p);
					$("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-1){
						$("a","#"+options.nextId).hide();
						$("a","#"+options.lastId).hide();
						$("#swsliderdiv").css("margin-left","12px");
                                                $("#swsliderdiv").css("background-position","-12px 0");
					} else {
						$("a","#"+options.nextId).show();
						$("a","#"+options.lastId).show();
						$("#swsliderdiv").css("margin-left","0");
                                                $("#swsliderdiv").css("background-position","0 0");
					};
					if(t==0){
						$("a","#"+options.prevId).hide();
						$("a","#"+options.firstId).hide();
						$("#swsliderdiv").css("margin-left","0");
                                                $("#swsliderdiv").css("background-position","0 0");
					} else {
						$("a","#"+options.prevId).show();
						$("a","#"+options.firstId).show();
						$("#swsliderdiv").css("margin-left","12px");
                                                $("#swsliderdiv").css("background-position","-12px 0");
					};
				};
				
				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);