(function($) {

	$.fn.win = 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'
		}; 
		
		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');
								
			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;						
				$(obj).after(html);										
			};
			
			if(options.numeric){									
				for(var i=0;i<s;i++){						
					$(document.createElement("li"))
						.attr('id',options.numericId + (i+1))
						.html('<a rel='+ i +' href=\"javascript:void(0);\">'+ (i+1) +'</a>')
						.appendTo($("#"+ options.numericId))
						.click(function(){							
							animate($("a",$(this)).attr('rel'),true);
						}); 												
				};							
			} else {
				$("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) 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; 
						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 }
						);				
					} 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","#"+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(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();				
			};				
			
		});
	  
	};


	  
	/**
	 * This jQuery plugin displays pagination links inside the selected elements.
	 *
	 * @author Gabriel Birke (birke *at* d-scribe *dot* de)
	 * @version 1.2
	 * @param {int} maxentries Number of entries to paginate
	 * @param {Object} opts Several options (see README for documentation)
	 * @return {Object} jQuery Object
	 */
	$.fn.pager = function(maxentries, opts){
		opts = jQuery.extend({
			items_per_page:10,
			num_display_entries:10,
			current_page:0,
			num_edge_entries:0,
			link_to:"#",
			prev_text:"Prev",
			next_text:"Next",
			ellipse_text:"...",
			prev_show_always:true,
			next_show_always:true,
			callback:function(){return false;}
		},opts||{});
		
		return this.each(function() {
			/**
			 * Calculate the maximum number of pages
			 */
			function numPages() {
				return Math.ceil(maxentries/opts.items_per_page);
			}
			
			/**
			 * Calculate start and end point of pagination links depending on 
			 * current_page and num_display_entries.
			 * @return {Array}
			 */
			function getInterval()  {
				var ne_half = Math.ceil(opts.num_display_entries/2);
				var np = numPages();
				var upper_limit = np-opts.num_display_entries;
				var start = current_page>ne_half?Math.max(Math.min(current_page-ne_half, upper_limit), 0):0;
				var end = current_page>ne_half?Math.min(current_page+ne_half, np):Math.min(opts.num_display_entries, np);
				return [start,end];
			}
			
			/**
			 * This is the event handling function for the pagination links. 
			 * @param {int} page_id The new page number
			 */
			function pageSelected(page_id, evt){
				current_page = page_id;
				drawLinks();
				var continuePropagation = opts.callback(page_id, panel);
				if (!continuePropagation) {
					if (evt.stopPropagation) {
						evt.stopPropagation();
					}
					else {
						evt.cancelBubble = true;
					}
				}
				return continuePropagation;
			}
			
			/**
			 * This function inserts the pagination links into the container element
			 */
			function drawLinks() {
				panel.empty();
				var interval = getInterval();
				var np = numPages();
				// This helper function returns a handler function that calls pageSelected with the right page_id
				var getClickHandler = function(page_id) {
					return function(evt){ return pageSelected(page_id,evt); }
				}
				// Helper function for generating a single link (or a span tag if it's the current page)
				var appendItem = function(page_id, appendopts){
					page_id = page_id<0?0:(page_id<np?page_id:np-1); // Normalize page id to sane value
					appendopts = jQuery.extend({text:page_id+1, classes:""}, appendopts||{});
					if(page_id == current_page){
						var lnk = jQuery("<span class='current'>"+(appendopts.text)+"</span>");
					}
					else
					{
						var lnk = jQuery("<a>"+(appendopts.text)+"</a>")
							.bind("click", getClickHandler(page_id))
							.attr('href', opts.link_to.replace(/__id__/,page_id));
							
							
					}
					if(appendopts.classes){lnk.addClass(appendopts.classes);}
					panel.append(lnk);
				}
				// Generate "Previous"-Link
				if(opts.prev_text && (current_page > 0 || opts.prev_show_always)){
					appendItem(current_page-1,{text:opts.prev_text, classes:"prev"});
				}
				// Generate starting points
				if (interval[0] > 0 && opts.num_edge_entries > 0)
				{
					var end = Math.min(opts.num_edge_entries, interval[0]);
					for(var i=0; i<end; i++) {
						appendItem(i);
					}
					if(opts.num_edge_entries < interval[0] && opts.ellipse_text)
					{
						jQuery("<span>"+opts.ellipse_text+"</span>").appendTo(panel);
					}
				}
				// Generate interval links
				for(var i=interval[0]; i<interval[1]; i++) {
					appendItem(i);
				}
				// Generate ending points
				if (interval[1] < np && opts.num_edge_entries > 0)
				{
					if(np-opts.num_edge_entries > interval[1]&& opts.ellipse_text)
					{
						jQuery("<span>"+opts.ellipse_text+"</span>").appendTo(panel);
					}
					var begin = Math.max(np-opts.num_edge_entries, interval[1]);
					for(var i=begin; i<np; i++) {
						appendItem(i);
					}
					
				}
				// Generate "Next"-Link
				if(opts.next_text && (current_page < np-1 || opts.next_show_always)){
					appendItem(current_page+1,{text:opts.next_text, classes:"next"});
				}
			}
			
			// Extract current_page from options
			var current_page = opts.current_page;
			// Create a sane value for maxentries and items_per_page
			maxentries = (!maxentries || maxentries < 0)?1:maxentries;
			opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0)?1:opts.items_per_page;
			// Store DOM element for easy access from all inner functions
			var panel = jQuery(this);
			// Attach control functions to the DOM element 
			this.selectPage = function(page_id){ pageSelected(page_id);}
			this.prevPage = function(){ 
				if (current_page > 0) {
					pageSelected(current_page - 1);
					return true;
				}
				else {
					return false;
				}
			}
			this.nextPage = function(){ 
				if(current_page < numPages()-1) {
					pageSelected(current_page+1);
					return true;
				}
				else {
					return false;
				}
			}
			// When all initialisation is done, draw the links
			drawLinks();
			// call callback function
			opts.callback(current_page, this);
		});
	};

})(jQuery);