/**
 * carousel - jQuery plugin to navigate images/any content in a carousel style widget.
 * @requires and works only on  jQuery v1.1.3.1 or above
 *
 * Original source
 * http://gmarwaha.com/jquery/jcarousellite/
 *
 * 
 * This File has been  modified for custom needs 
 *  Load the image only if it is being displayed
 *  Hightlight the current Index image
 * girtethde 
 */
var previtem;
(function($) {                                          // Compliant with jquery.noConflict()
$.fn.carousel = function(o) {
    o = $.extend({
        btnPrev: null,
        btnNext: null,
        btnGo: null,
        mouseWheel: false,
        auto: null,
        liparam:null,

        speed: 200,
        easing: null,


        vertical: false,
        circular: true,
        visible: 3,
        start: 0,
        scroll: 1,

        beforeStart: null,
        afterEnd: null
    }, o || {});

var div = $(this), ul = $("ul", div);

 ul.html("");
 for(c=0;c<o.liparam.length;c++){
  if(c < o.visible){
    ul.html(ul.html()+"<li id='"+o.btnPrev+"_"+c+"' style='width:"+o.liwidth+";height:"+o.liheight+";'>"+o.liparam[c]+"</li>");
  }
  else{
  ul.html(ul.html()+"<li id='"+o.btnPrev+"_"+c+"' ></li>");
  }
 }
//ul.html("<li id='li_0' style='width:100px;height:100px'>xgfdgdfgdfg</li><li id='li_1'  style='width:100px;height:100px'>1</li><li  style='width:100px;height:100px' id='li_2'  style='width:100px;height:100px' ></li><li id='li_3'  style='width:100px;height:100px'  ></li><li id='li_4'  style='width:100px;height:100px'></li><li id='li_5'  style='width:100px;height:100px'></li><li id='li_6'  style='width:100px;height:100px'></li><li id='li_7'  style='width:100px;height:100px'></li>");

    return this.each(function() {                           // Returns the element collection. Chainable.

        var running = false, animCss=o.vertical?"top":"right", 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.html("idsjgkldsjgkljdsgjdskljgkdsjgkjdskjgdskjghai");




        li.css({overflow: "hidden", float: o.vertical ? "none" : "right"});

        ul.css({margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1"});

        div.css({overflow: "hidden", position: "relative", "z-index": "2", right: "0px"});

        var liSize = o.vertical ? height(li) : width(li);
        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)

        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);
        };
         if(o.doEnd){         
          return go(o.liparam.length - o.visible);
         }
         else{
         return go(0);
         }
        function go(to) {
          if(to>=0 && to<=itemLength-v && o.btnPrefix){
              if(previtem !=""){             
               
                $("#"+o.btnPrefix+previtem).removeClass("active");
               
              }
              previtem = to+1;
              $("#"+o.btnPrefix+(to+1)).addClass("active");
         }
         if(to>0 && to<itemLength-v+1){
          for(i=to-(v-1);i<to+v;i++){
            if(i > 0){
            document.getElementById(o.btnPrev+"_"+i).innerHTML= o.liparam[i];
            }
          }
         }
         else{
          if(to>itemLength-v+1){
            $(o.btnNext).addClass("disabled");
          }
          else if(to<0){
            $(o.btnPrev).addClass("disabled");
          }
         }
            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 == "right" ? { right: -(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;
        };
        $(o.btnPrev + "," + o.btnNext).removeClass("disabled");
        $( (curr-o.scroll<0 && o.btnPrev)
            ||
           (curr+o.scroll > itemLength-v && o.btnNext)
            ||
           []
         ).addClass("disabled");
   
    });
   

};

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);
// JavaScript Document