(function($) {
	/**
* jCarouselLite - jQuery plugin to navigate images/any content in a carousel style widget.
* @requires jQuery v1.2 or above
*
* @author Ganeshji Marwaha
* @author Karl Swedberg (modifications/enhancements)
*
*
* http://gmarwaha.com/jquery/jcarousellite/
*
* Copyright (c) 2007 Ganeshji Marwaha (gmarwaha.com)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* Version: 1.3
* Note: Requires jquery 1.2 or above from version 1.0.1
* Note: Requires jQuery 1.4 from version 1.3
*/

	$.jCarouselLite = {
		version: '1.3'
	};

	$.fn.jCarouselLite = function(options) {
		var o = $.extend({}, $.fn.jCarouselLite.defaults, options);
		return this.each(function() {

			var running = false,
			animCss=o.vertical?"top":"left",
			sizeCss=o.vertical?"height":"width";

			var div = $(this), ul = div.find('ul'), tLi = ul.children('li'), tl = tLi.length, v = o.visible;
			o.start = Math.min(o.start, tLi.length-1);

			if (o.circular) {
				ul.prepend(tLi.slice(tl-v-1+1).clone(true))
				.append(tLi.slice(0,v).clone(true));
				o.start += v;
			}

			var li = ul.children('li'), itemLength = li.length, curr = o.start;
			div.css("visibility", "visible");

			li.css({
				overflow: o.vertical ? "hidden" : 'visible',
				'float': o.vertical ? "none" : "left"
				});
			ul.css({
				margin: "0",
				padding: "0",
				position: "relative",
				"list-style-type": "none",
				"z-index": "1"
			});
			div.css({
				overflow: "hidden",
				position: "relative",
				"z-index": "2",
				left: "0px"
			});
			var liSize = o.vertical ? height(li) : width(li); // Full li size(incl margin)-Used for animation
			var ulSize = liSize * itemLength; // size of full ul(total length, not just for the visible items)
			var divSize = liSize * v; // size of entire div(total length for just the visible items)

			li.css({
				width: li.width(),
				height: li.height()
				});
			ul.css(sizeCss, ulSize+"px").css(animCss, -(curr*liSize));

			div.css(sizeCss, divSize+"px"); // Width of the DIV. length of visible images

			// CHANGED: bind click handlers to prev and next buttons, if set (Karl Swedberg)
			$.each([ 'btnPrev', 'btnNext' ], function(index, btn) {
				if ( o[btn] ) {
					o['$' + btn] = $.isFunction( o[btn] ) ? o[btn].call( div[0] ) : $( o[btn] );

					o['$' + btn].click(function() {
						var step = index == 0 ? curr-o.scroll : curr+o.scroll;
						return go( step );
					});
				}
			});

			if (!o.circular) {
				if (o.btnPrev && o.start == 0) {
					o.$btnPrev.addClass(o.btnDisabledClass);
				}
				if ( o.btnNext && o.start + o.visible >= itemLength ) {
					o.$btnNext.addClass(o.btnDisabledClass);
				}
			}
			if (o.btnGo) {
				$.each(o.btnGo, function(i, val) {
					$(val).click(function() {
						return go(o.circular ? o.visible+i : i);
					});
				});
			}

			if (o.mouseWheel && div.mousewheel) {
				div.mousewheel(function(e, d) {
					return d>0 ? go(curr-o.scroll) : go(curr+o.scroll);
				});
			}

			if (o.auto) {
				// CHANGED: Added pause on hover (Karl Swedberg)
				var setAutoAdvance,
				advanceCounter = 0,
				autoStop = iterations(tl,o);

				var advancer = function() {
					setAutoAdvance = setTimeout(function() {
						if (!autoStop || autoStop > advanceCounter) {
							go(curr+o.scroll);
							advanceCounter++;
							advancer();
						}
					}, o.timeout+o.speed);
				};

				advancer();

				$(document)
				.bind('pauseCarousel', function(event) {
					clearTimeout(setAutoAdvance);
					$(event.target).data('paused', true);
				})
				.bind('resumeCarousel', function(event) {
					advancer();
					$(event.target).data('paused', false);
				});
				if (o.pause) {
					div.mouseenter(function() {
						div.trigger('pauseCarousel');
					}).mouseleave(function() {
						div.trigger('resumeCarousel');
					});
				}
			}

			function vis() {
				return li.slice(curr).slice(0,v);
			}

			function go(to) {
				if (!running) {

					if (o.beforeStart) {
						o.beforeStart.call(this, vis());
					}
					if (o.circular) { // If circular we are in first or last, then goto the other end
						if (to<=o.start-v-1) { // If first, then goto last
							ul.css(animCss, -((itemLength-(v*2))*liSize)+"px");
							// If "scroll" > 1, then the "to" might not be equal to the condition; it can be lesser depending on the number of elements.
							curr = to==o.start-v-1 ? itemLength-(v*2)-1 : itemLength-(v*2)-o.scroll;
						} else if (to>=itemLength-v+1) { // If last, then goto first
							ul.css(animCss, -( (v) * liSize ) + "px" );
							// If "scroll" > 1, then the "to" might not be equal to the condition; it can be greater depending on the number of elements.
							curr = to==itemLength-v+1 ? v+1 : v+o.scroll;
						} else {
							curr = to;
						}
					// If non-circular and to points beyond first or last, we change to first or last.
					} else {
						// Disable buttons when the carousel reaches the last/first, and enable when not
						o.$btnPrev.toggleClass(o.btnDisabledClass, o.btnPrev && to <= 0);
						o.$btnNext.toggleClass(o.btnDisabledClass, o.btnNext && to > itemLength-v);

						if (to<0) {
							curr = 0;
						} else if (to>itemLength-v) {
							curr = itemLength-v;
						} else {
							curr = to;
						}
					}

					running = true;
					
					ul.animate(animCss == "left" ? {
						left: -(curr*liSize)
					} : {
						top: -(curr*liSize)
					} , o.speed, o.easing, function() {
						if (o.afterEnd) {
							o.afterEnd.call(this, vis());
						}
						running = false;
					});

				}
				return false;
			} // end if !running
		});
	};
	$.fn.jCarouselLite.defaults = {
		btnPrev: null,
		btnNext: null,
		btnDisabledClass: 'disabled',
		btnGo: null,
		mouseWheel: false,

		speed: 200,
		easing: null,
		auto: false, // true to enable auto scrolling
		autoStop: false, // number of times before autoscrolling will stop. (if circular is false, won't iterate more than number of items)
		timeout: 4000, // milliseconds between scrolls
		pause: true, // pause scrolling on hover

		vertical: false,
		circular: true, // continue scrolling when reach the last item
		visible: 3,
		start: 0, // index of item to show initially in the first posiition
		scroll: 1, // number of items to scroll at a time

		beforeStart: null,
		afterEnd: null
	};

	function css(el, prop) {
		return parseInt($.css(el[0], prop), 10) || 0;
	}
	function width(el) {
		return el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');
	}
	function height(el) {
		return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');
	}
	function iterations(itemLength, options) {
		return options.autoStop && (options.circular ? options.autoStop : Math.min(itemLength, options.autoStop));
	}
})(jQuery);