ÿþ/**

 * jCarouselLite - jQuery plugin to navigate images/any content in a carousel style widget.

 * @requires jQuery v1.2 or above

 *

 * 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: 1.0.1

 * Note: Requires jquery 1.2 or above from version 1.0.1

 */



(function($) {                                          // Compliant with jquery.noConflict()

$.fn.jCarouselLite = function(o) {

    o = $.extend({

        btnPrev: null,

        btnNext: null,

        btnGo: null,

        mouseWheel: false,

        auto: null,



        speed: 800,

        easing: null,



        vertical: false,

        circular: true,

        visible: 4,

        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));

        

        curParent = li.slice(curr);

        curItem = $("img", curParent).slice(0).attr("alt");

        

		$(".carousel-bottom-margin").html( curItem );



        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.



		        curParent = li.slice(curr);

		        curItem = $("img", curParent).slice(0).attr("alt");

		        

				$(".carousel-bottom-margin").html( curItem );

				

                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);