(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: 		true,
			numericId: 		'controls'
		}; 
		
		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(); 
			var clickable = true;
			
			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.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+1)*w);
			};				
			
			if(!options.vertical) 
			{
				$("li", obj).css('float','left');
				$("ul#controls > li").css('opacity','0.5');
			}
								
			if(options.controlsShow){
				var html = options.controlsBefore;
				
				/*if(options.numeric){
					html += '<ol id="'+ options.numericId +'"></ol>';
				} else {*/
					if(options.firstShow) html += '<span id="'+ options.firstId +'"><a href=\"javascript:void(0);\">'+ options.firstText +'</a></span>';
					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>';					
					if(options.lastShow) html += ' <span id="'+ options.lastId +'"><a href=\"javascript:void(0);\">'+ options.lastText +'</a></span>';				
				//};
				
				html += options.controlsAfter;						
				$('#navigationControl').html(html);										
			};
			
			if(options.numeric)
			{
				for(var i=0; i<s; i++)
				{
					$('#controls > li')
						.click(function(){
							animate($("a",$(this)).attr('rel'),true);
						});
				};
			}
			
			$("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)
			{
				//$("ul#controls > li").css('opacity','0.5');
				
				/*$('#controls > li > a').each(function() {
					$(this).find('img').removeClass('current');					
				});
				
				i = parseInt(i) + 1;
				$("li#" + options.numericId + i + ' > a > img').addClass("current");
				*/
				
				$('ul#controls > li').each(function() {
					$(this).removeClass('active');
					$(this).find('img').removeClass('current');
				}).hover(function () {
			    	$(this).css("opacity", "1");
			    }, function(){
			    	$(this).css("opacity", "0.5");
				});
				
				i = parseInt(i) + 1;
				$("li#" + options.numericId + i).addClass("active");
				$("li#" + options.numericId + i + ' > a > img').addClass("current");
			};
			
			function adjust(obj)
			{
				if (t > ts) t = 0;
				if (t < 0) t = ts;
				
				/* Find and sets main image height: start */
				
				var findList = $(obj).find('li');
				
				$(findList).each(function ()
				{
					var findThumbRelation = $('#controls a[rel = ' + t + ']').find('img').attr('src');
					var findThumbImageSrc = findThumbRelation.split('&');
					var findMainImageSrc = $(this).find('img').attr('src').split('&');
					var findMainImageHeight = $(this).find('img').height();
					
					if(findMainImageSrc[0] == findThumbImageSrc[0])
					{
						var findContainerHeight = $('#container').height();
						var findNavigationImageHeight = $('#navigationControl').find('a').height();
						$('#navigationControl').css({'top' : ((findContainerHeight / 2) + (findNavigationImageHeight / 2)) + 'px'});
						
						$("#slider").css({'height':findMainImageHeight});
					}
					
					if($(this).find('dl').length > 0)
					{
						var findContainerHeight = $('#container').height();
						var findNavigationImageHeight = $('#navigationControl').find('a').height();
						$('#navigationControl').css({'top' : ((findContainerHeight / 2) + (findNavigationImageHeight / 2)) + 'px'});
						
						$(this).find('dl').css({'height':findMainImageHeight});
					}
					
				});
				
				/* Find and sets main image height: end */
				
				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 ? eval(t) + 1 : ts) : eval(t) + 1;
							//alert(t);
							break; 
						case "prev":
							t = (t<=0) ? (options.continuous ? eval(t) - 1 : 0) : eval(t) - 1;
							break; 
						case "first":
							t = 0;
							break; 
						case "last":
							t = ts;
							break; 
						default:
							t = dir;
							break; 
					};
					
					var diff = Math.abs(ot-t);
					var speed = diff*options.speed;
					
					if(!options.vertical)
					{
						p = (t*w*-1);
						$("ul", obj).animate(
							{ marginLeft: p}, 
							{ queue:false, duration:speed, complete:adjust($("ul", obj)) }
						);
					}
					else
					{
						p = (t*h*-1);
						$("ul", obj).animate(
							{ marginTop: p }, 
							{ queue:false, duration:speed, complete:adjust }
						);
					};
					
					if(!options.continuous && options.controlsFade){					
						
						if(t==ts){
							$("a","#").show();
							$("a","#").show();
						} else {
							$("a","#"+options.nextId).show();
							$("a","#"+options.lastId).show();					
						};
						if(t==0){
							$("a","#").show();
							$("a","#").show();
						} 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.numeric) setCurrent(0);
		
			if(!options.continuous && options.controlsFade){					
				$("a","#").show();
				$("a","#").show();				
			};
			
		});
	  
	};

})(jQuery);