// ver 2
(function($){
var o;                                          // Compliant with jquery.noConflict()
$.fn.slideshow = function(o) {
    o = $.extend({
		slideShowId: null,
		slideShowAuto: true,
		titleBoxId: null,
		titleBoxOpacity: 0.5,
        btnPrev: null,
        btnNext: null,
        btnGo: null,
        auto: 5000,
        speed: 1500,
        easing: null,
        vertical: false,
        circular: false,
        visible: 2,
		zIndex: 55,
        start: 0,
        scroll: 1,
        beforeStart: null,
        afterEnd: null
    },
	o || {});
	
	var firstrun = true;
	$('img:last', o.slideShowId ).css({opacity: 0}).addClass('active');
	slideSwitch( $(o.slideShowId), o.speed );// used to fade initial image fade onload, needs above line
	
	if(o.slideShowAuto)
	{ 
		slideShowInterval = setInterval( function(){ slideSwitch( $(o.slideShowId), o.speed ); }, o.auto ); 
	}else
	{
		slideShowInterval = 0;
	}
	
	//run function for thumbnails
	if($(this).attr('id') != undefined){
		liLoop($(this), o);
	}
	
	function liLoop(element, o){
		var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width";
        var div = $(element), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible;
        if(o.circular) {
            ul.prepend(tLi.slice(tl-v-1+1).clone(true))
              .append(tLi.slice(0,v).clone(true));
            o.start += v;
        }
		
			//click function thumnails
		$('ul li',element).click(function(){
			clearInterval(carouselInterval);
			clearInterval(slideShowInterval);
			//
			$('ul li',element).removeClass('currentThumb');
			$(this).addClass('currentThumb');
			//
			thumbID = $(this).attr('id').split("thumbnail");
			setSlideShowImage( $(o.slideShowId), thumbID[1], o.speed );
		});
			
        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": o.zIndex });
        div.css({overflow: "hidden", position: "relative", "z-index": o.zIndex});

        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() {  clearInterval(carouselInterval); return go(curr-o.scroll); });
        if(o.btnNext) $(o.btnNext).click(function() { clearInterval(carouselInterval); 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.auto) carouselInterval = setInterval(function() { go(curr+o.scroll); }, o.auto+o.speed);

		if( $('ul li',element).size() < 2 ){
			clearInterval(carouselInterval);
			clearInterval(slideShowInterval);
		
		}
	}
	
	
	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;
        }; /* end function go(to) */
	
	function css(el, prop) {
		return parseInt($.css(el[0], prop)) || 0;
	};
	
	function width(el) {
		return  el[0].offsetWidth + css(el, 'margin-left') + css(el, 'margin-right');
	};
	
	function height(el) {
		return el[0].offsetHeight + css(el, 'margin-top') + css(el, 'margin-bottom');
	};
	
	function slideSwitch( element, speed ) {
		var $active = $('img.active', element );
		if ( $active.length == 0 ) $active = $( 'img:first', element );
		var $prev = $active.prev().length ? $active.prev() : $( 'img:last', element );
		var $next =  $active.next().length ? $active.next() : $( 'img:first', element );
		resetThumb = $active.next().length ? false : true;
		$prev.removeClass('last-active');	
		$active.animate( {opacity: 0}, speed ).removeClass('active').addClass('last-active');
		$next.addClass('active').css({opacity: 0}).animate({opacity: 1}, speed);
		showImageTitle( $next.attr('title') );
		//alert($active.attr('id'))
			if(firstrun){
				firstrun= false;
				$('#thumbnail0').addClass('currentThumb');
			}else{
				mainNum = $active.attr('id').split("mainImage");
				oldNum = parseInt(mainNum[1]);
				if(resetThumb){
					newNum = 0;
				}else{
					newNum = parseInt(mainNum[1])+1;
				}
				$('#thumbnail'+oldNum).removeClass('currentThumb');
				//alert('#thumbnail'+newNum+1);
				$('#thumbnail'+newNum).addClass('currentThumb');
			}
		};
		
	function setSlideShowImage( element, thumbID, speed){
		var $clickedImage = $('#mainImage'+thumbID);
		if(! $clickedImage.hasClass("active") ){
			//alert("mainImage"+thumbID);
			$('img.last-active', element ).removeClass('last-active');
			$('img.active', element ).removeClass('active').addClass('last-active');
			$clickedImage.css({opacity: 0}).addClass('active').animate({opacity: 1}, speed/2 );
			$("img.last-active", element).animate({opacity: 0}, speed/2, function(){showImageTitle( $clickedImage.attr('title') );});
			
		}
	}
	
	function showImageTitle(theText){
		if(o.titleBoxId) $(o.titleBoxId).animate({opacity: 0}, o.speed/2, function(){ $(o.titleBoxId).html(theText).animate({opacity: o.titleBoxOpacity}, o.speed/2); } );
	}

};
	
})(jQuery);