// JavaScript Document

(function($) {

	$.fn.easySlider = function(options){
	  
		// default configuration properties
		var defaults = {
			prevId: 		'prevBtn',
			prevText: 		'Previous',
			nextId: 		'nextBtn',	
			nextText: 		'Next',
			orientation:	'', //  'vertical' is optional;
			speed: 			600			
		};
        
		var options = $.extend(defaults, options);  
		
		return this.each(function() {  
			obj = $(this); 				
			var s = $("li", obj).length;
			var w = obj.width(); 
			var h = obj.height(); 
			var ts = s-1;
			var t = 0;
			var vertical = (options.orientation == 'vertical');
			$("ul", obj).css('width',s*w);			
			if(!vertical) $("li", obj).css('float','left');
						
			$("a","#btn1").click(function(){		
				jumpTo(1);
			});
			$("a","#btn2").click(function(){		
				jumpTo(2);
			});
			$("a","#btn3").click(function(){		
				jumpTo(3);
			});
			$("a","#btn4").click(function(){		
				jumpTo(4);
			});
			$("a","#btnNext").click(function(){		
				moveForward();
			});
			
			function jumpTo(num) {
				fadeAllBtns();
				p = ((num-1)*w*-1);
					$("ul",obj).animate(
						{ marginLeft: p }, 
						options.speed
					);
				$('#btn'+num).fadeTo(0,1);
				t = num-1;
				clearInterval(de);
				de = setInterval(moveForward,8000);
			}
			
            de = setInterval(moveForward,8000);
			
			function btnsGo() {
			$('#btn2').fadeTo(0,0.7);
			$('#btn3').fadeTo(0,0.7);
			$('#btn4').fadeTo(0,0.7);
			}
			
			function fadeAllBtns() {
			$('#btn1').fadeTo(0,0.7);
			$('#btn2').fadeTo(0,0.7);
			$('#btn3').fadeTo(0,0.7);
			$('#btn4').fadeTo(0,0.7);
			}
			
			btnsGo();
        
        function moveForward() {
            if (t>=ts) {
			fadeAllBtns();
            t = (t<=0) ? 0 : t-1;
            p = (t*w*+0);
					$("ul",obj).animate(
						{ marginLeft: p }, 
						options.speed
					);
            t = 0;
			$('#btn1').fadeTo(0,1);
            } else {
            animate("next");
            } ;
        } 
        
			function animate(dir){
				clearInterval(de);
				de = setInterval(moveForward,8000);
				fadeAllBtns();
				if(dir == "next"){
					t = (t>=ts) ? ts : t+1;	
				} else {
					t = (t<=0) ? 0 : t-1;
				};
				$('#btn'+(t+1)).fadeTo(0,1);
				if(!vertical) {
					p = (t*w*-1);
					$("ul",obj).animate(
						{ marginLeft: p }, 
						options.speed
					);				
				} else {
					p = (t*h*-1);
					$("ul",obj).animate(
						{ marginTop: p }, 
						options.speed
					);					
				}
			};
			if(s>1) $("a","#"+options.nextId).fadeIn();	
		});
	  
	};

})(jQuery);