/*!
 * Marquee jQuery Plug-in
 *
 * Copyright 2009 Giva, Inc. (http://www.givainc.com/labs/) 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * 	http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Date: 2009-05-20
 * Rev:  1.0.01
 */
;(function($){
	
	(function($) {                                          // Compliant with jquery.noConflict()
	$.fn.jCarouselLite = function(o) {
		o = $.extend({
			btnPrev: null,
			btnNext: null,
			btnGo: null,
			mouseWheel: false,
			auto: null,
	
			speed: 500,
			easing: null,
	
			vertical: false,
			circular: true,
			visible: 3,
			start: 0,
			scroll: 1,
	
			beforeStart: null,
			afterEnd: null
		}, o || {});
	
		return this.each(function() {                           // Returns the element collection. Chainable.
	
			var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width";
			var div = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible;
	
			if(o.circular) {
				ul.prepend(tLi.slice(tl-v-1+1).clone())
				  .append(tLi.slice(0,v).clone());
				o.start += v;
			}
	
			var li = $("li", ul), itemLength = li.size(), curr = o.start;
			div.css("visibility", "visible");
	
			li.css({overflow: "hidden", 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
	
			if(o.btnPrev)
				$(o.btnPrev).click(function() {
					return go(curr-o.scroll);
				});
	
			if(o.btnNext)
				$(o.btnNext).click(function() {
					return go(curr+o.scroll);
				});
	
			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)
				setInterval(function() {
					go(curr+o.scroll);
				}, o.auto+o.speed);
	
			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;
					} else {                    // If non-circular and to points to first or last, we just return.
						if(to<0 || to>itemLength-v) return;
						else curr = to;
					}                           // If neither overrides it, the curr will still be "to" and we can proceed.
	
					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;
						}
					);
					// Disable buttons when the carousel reaches the last/first, and enable when not
					if(!o.circular) {
						$(o.btnPrev + "," + o.btnNext).removeClass("disabled");
						$( (curr-o.scroll<0 && o.btnPrev)
							||
						   (curr+o.scroll > itemLength-v && o.btnNext)
							||
						   []
						 ).addClass("disabled");
					}
	
				}
				return false;
			};
		});
	};
	
	function css(el, prop) {
		return parseInt($.css(el[0], prop)) || 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');
	};
	
	})(jQuery);
	/*--WEBTV--*/





})(jQuery);