/*
 * 	Easy Slider 1.5 - jQuery plugin
 *	written by Alen Grakalic	
 *	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
 *
 *	Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
 *	Dual licensed under the MIT (MIT-LICENSE.txt)
 *	and GPL (GPL-LICENSE.txt) licenses.
 *
 *	Built for jQuery library
 *	http://jquery.com
 *
 */
 
/*
 *	markup example for $("#slider").easySlider();
 *	
 * 	<div id="slider">
 *		<ul>
 *			<li><img src="images/01.jpg" alt="" /></li>
 *			<li><img src="images/02.jpg" alt="" /></li>
 *			<li><img src="images/03.jpg" alt="" /></li>
 *			<li><img src="images/04.jpg" alt="" /></li>
 *			<li><img src="images/05.jpg" alt="" /></li>
 *		</ul>
 *	</div>
 *
 */

var prevw = 0;
var pw = 0;
var prevsw = 0;
var offset = 0;
var autodir = "next";
var timeout;

(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:			true,
			pause:			3500,
			sliderwidth:		600,
			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 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;						
				$(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;
						break; 
					default:
						break; 
				};
				
				pos = Number(t+1);
				
				posprev = Number(pos-1);
				posnext = Number(pos+1);
				
				if(posprev > 1 && document.getElementById('slide'+posprev).style.width < options.sliderwidth){
					document.getElementById('slide'+posprev).style.width = document.getElementById('pic'+posprev).offsetWidth + 'px';
				}
				if(posnext > 1 && posnext <= ts+1 && document.getElementById('slide'+posnext).style.width < options.sliderwidth){
					document.getElementById('slide'+posnext).style.width = document.getElementById('pic'+posnext).offsetWidth + 'px';
				}
				if(pos > 1 && document.getElementById('slide'+pos).style.width < options.sliderwidth){
					document.getElementById('slide'+pos).style.width = document.getElementById('pic'+pos).offsetWidth + 'px';
				}
				
				if(prevw == 0) prevw = options.sliderwidth;
				
				if(options.sliderwidth > document.getElementById('slide'+pos).offsetWidth){
					w = options.sliderwidth-(options.sliderwidth-document.getElementById('slide'+pos).offsetWidth)/2;
				}else if(prevw < options.sliderwidth){
					w = options.sliderwidth;
				}else if(pos == ts+1){
					w = 2*options.sliderwidth-prevw;
				}else{
					w = options.sliderwidth;					
				}
				
				var diff = Math.abs(ot-t);
				var speed = diff*options.speed;						
				if(dir == 'next'){
					p = -1*(prevsw + w);
					prevsw += document.getElementById('slide'+pos).offsetWidth;
				}else{
					w = w - document.getElementById('slide'+pos).offsetWidth;
					prevsw -= prevw;
					p = -1*(prevsw + w);
				}
				
				prevw = document.getElementById('slide'+pos).offsetWidth;
				
				
				
				$("ul",obj).animate(
					{ marginLeft: p },
					speed
				);
				
				$('#slide'+pos).animate(
					{ opacity: 1 },
					speed
				);
				
				$('#info'+pos).animate(
					{ opacity: 1 },
					speed
				);

				if(posprev > 0){
					$('#slide'+posprev).animate(
						{ opacity: 0.3 },
						speed
					);
					$('#info'+posprev).animate(
						{ opacity: 0 },
						speed
					);
				}
				
				if(posprev < ts){
					$('#slide'+posnext).animate(
						{ opacity: 0.3 },
						speed
					);
					$('#info'+posnext).animate(
						{ opacity: 0 },
						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(ts > 0){
					if(options.auto && !clicked){;
						timeout = setTimeout(function(){
							if(t == ts) autodir = "prev";
							if(t < 1) autodir = "next";
							animate(autodir,false);					
						},diff*options.speed+options.pause);
					};
				}
				
			};
			
			window.onload=function(){
				if(ts > 0){
					// init
					var timeout;
					if(options.auto){;
						timeout = setTimeout(function(){
							animate(autodir,false);
						},options.pause);
					};		
				}
				
				if(document.getElementById('slide1').offsetWidth / document.getElementById('slide1').offsetHeight > document.getElementById('pic1').offsetWidth / document.getElementById('pic1').offsetHeight){
					document.getElementById('pic1').style.width = options.sliderwidth + 'px';
					document.getElementById('pic1').style.height = 'auto';
				}else{
					document.getElementById('pic1').style.width = 'auto';
					document.getElementById('pic1').style.height = '485px';
				}
				
				$('#slidersloader').animate(
					{ opacity: 0 },700
				);
				
								
				setTimeout("document.getElementById('slidersloader').style.display = 'none'",700);
				
			}
			
			if(!options.continuous && options.controlsFade){					
				$("a","#"+options.prevId).hide();
				$("a","#"+options.firstId).hide();				
			};				
			
		});	  
	};

})(jQuery);


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