/****************************************************************************************************

jcarousellite with an easing extention for jquery

****************************************************************************************************/

(function(jQuery) { // Compliant with jquery.noConflict()
jQuery.fn.jCarouselLite = function(o) {
 o = jQuery.extend({
 btnPrev: null,
btnNext: null,
mouseWheel: false,
 auto: null,
 speed: 200,
 easing: null,
 vertical: false,
 circular: true,
 navcontainer:null,
 sectionlinks:null,
 visible: 3,
 start: 0,
 scroll: 1,
 pauseOnHover: true,
 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 = jQuery(this), ul = jQuery("ul", div), tLi = jQuery("li", ul), tl = tLi.size(), v = o.visible;

 var isMouseOver = false;


 // added: only perform if li > 1
 if(o.circular && tl > 1) {
 ul.prepend(tLi.slice(tl-v-1+1).clone()).append(tLi.slice(0,v).clone());
 o.start += v;
 }

update_navigation(1);

 var li = jQuery(o.panel), 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)
 var nav = jQuery(o.navcontainer);

 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

 li.mouseover(function(){ isMouseOver = true; });
li.mouseout(function(){ isMouseOver = false; });
 nav.mouseover(function(){ isMouseOver = true; });
nav.mouseout(function(){ isMouseOver = false; });

 if(o.btnPrev)
 jQuery(o.btnPrev).click(function() {
return go(curr-o.scroll);
 });

 if(o.btnNext)
 jQuery(o.btnNext).click(function() {
 return go(curr+o.scroll);
});

 if(o.btnGo) {
 jQuery.each(o.btnGo, function(i, val) {
 jQuery(val).click(function() {

 return go(o.circular ? o.visible+i : i+1);
 });
 });
 }

 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() {
if(o.pauseOnHover && isMouseOver) return;
 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;
 }


 );
 update_navigation((o.circular) ? 0+curr : 1+curr);
 // Disable buttons when the carousel reaches the last/first, and enable when not
 if(!o.circular) {
 jQuery(o.btnPrev + "," + o.btnNext).removeClass("disabled");
 jQuery( (curr-o.scroll<0 && o.btnPrev)
 ||
 (curr+o.scroll > itemLength-v && o.btnNext)
 ||
 []
 ).addClass("disabled");
 }

 }
 return false;
 };


 function update_navigation(curr){
 var kids = jQuery(o.panel);
 var cloneVal = (o.circular) ? 2 : 0;
 var pos = (kids.size()-cloneVal <= curr) ? (curr > kids.size()-cloneVal) ? 1 : kids.size()-cloneVal : curr;
 pos = (pos == 0) ? kids.size()-cloneVal : pos;

 var sectionLinks = jQuery(o.sectionlinks);



 for(k = 0; k < sectionLinks.size(); k++){
 if(pos == k+1){
 jQuery(sectionLinks[k]).attr("class", 'selected');
 } else {
 jQuery(sectionLinks[k]).attr("class", 'off');
 }
}
};

});
};

function css(el, prop) {
 return parseInt(jQuery.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);


jQuery.extend( jQuery.easing,
{
easeInQuad: function (x, t, b, c, d) {
return c*(t/=d)*t + b;
},
easeOutQuad: function (x, t, b, c, d) {
return -c *(t/=d)*(t-2) + b;
},
easeInOutQuad: function (x, t, b, c, d) {
if ((t/=d/2) < 1) return c/2*t*t + b;
return -c/2 * ((--t)*(t-2) - 1) + b;
}

});