How can I set up a home page slider? (HTML)

/*
* jQuery FlexSlider v2.1
* http://www.woothemes.com/flexslider/
*
* Copyright 2012 WooThemes
* Free to use under the GPLv2 license.
* http://www.gnu.org/licenses/gpl-2.0.html
*
* Contributing author: Tyler Smith (@mbmufffin)
*/

;(function ($) {

//FlexSlider: Object Instance
$.flexslider = function(el, options) {
var slider = $(el),
vars = $.extend({}, $.flexslider.defaults, options),
namespace = vars.namespace,
touch = ("ontouchstart" in window) || window.DocumentTouch && document instanceof DocumentTouch,
eventType = (touch) ? "touchend" : "click",
vertical = vars.direction === "vertical",
reverse = vars.reverse,
carousel = (vars.itemWidth > 0),
fade = vars.animation === "fade",
asNav = vars.asNavFor !== "",
methods = {};

// Store a reference to the slider object
$.data(el, "flexslider", slider);

// Privat slider methods
methods = {
init: function() {
slider.animating = false;
slider.currentSlide = vars.startAt;
slider.animatingTo = slider.currentSlide;
slider.atEnd = (slider.currentSlide === 0 || slider.currentSlide === slider.last);
slider.containerSelector = vars.selector.substr(0,vars.selector.search(' '));
slider.slides = $(vars.selector, slider);
slider.container = $(slider.containerSelector, slider);
slider.count = slider.slides.length;
// SYNC:
slider.syncExists = $(vars.sync).length > 0;
// SLIDE:
if (vars.animation === "slide") vars.animation = "swing";
slider.prop = (vertical) ? "top" : "marginLeft";
slider.args = {};
// SLIDESHOW:
slider.manualPause = false;
// TOUCH/USECSS:
slider.transitions = !vars.video && !fade && vars.useCSS && (function() {
var obj = document.createElement('div'),
props = ['perspectiveProperty', 'WebkitPerspective', 'MozPerspective', 'OPerspective', 'msPerspective'];
for (var i in props) {
if ( obj.style[ props[i] ] !== undefined ) {
slider.pfx = props[i].replace('Perspective','').toLowerCase();
slider.prop = "-" + slider.pfx + "-transform";
return true;
}
}
return false;
}());
// CONTROLSCONTAINER:
if (vars.controlsContainer !== "") slider.controlsContainer = $(vars.controlsContainer).length > 0 && $(vars.controlsContainer);
// MANUAL:
if (vars.manualControls !== "") slider.manualControls = $(vars.manualControls).length > 0 && $(vars.manualControls);

// RANDOMIZE:
if (vars.randomize) {
slider.slides.sort(function() { return (Math.round(Math.random())-0.5); });
slider.container.empty().append(slider.slides);
}

slider.doMath();

// ASNAV:
if (asNav) methods.asNav.setup();

// INIT
slider.setup("init");

// CONTROLNAV:
if (vars.controlNav) methods.controlNav.setup();

// DIRECTIONNAV:
if (vars.directionNav) methods.directionNav.setup();

// KEYBOARD:
if (vars.keyboard && ($(slider.containerSelector).length === 1 || vars.multipleKeyboard)) {
$(document).bind('keyup', function(event) {
var keycode = event.keyCode;
if (!slider.animating && (keycode === 39 || keycode === 37)) {
var target = (keycode === 39) ? slider.getTarget('next') :
(keycode === 37) ? slider.getTarget('prev') : false;
slider.flexAnimate(target, vars.pauseOnAction);
}
});
}
// MOUSEWHEEL:
if (vars.mousewheel) {
slider.bind('mousewheel', function(event, delta, deltaX, deltaY) {
event.preventDefault();
var target = (delta < 0) ? slider.getTarget('next') : slider.getTarget('prev');
slider.flexAnimate(target, vars.pauseOnAction);
});
}

// PAUSEPLAY
if (vars.pausePlay) methods.pausePlay.setup();

// SLIDSESHOW
if (vars.slideshow) {
if (vars.pauseOnHover) {
slider.hover(function() {
if (!slider.manualPlay && !slider.manualPause) slider.pause();
}, function() {
if (!slider.manualPause && !slider.manualPlay) slider.play();
});
}
// initialize animation
(vars.initDelay > 0) ? setTimeout(slider.play, vars.initDelay) : slider.play();
}

// TOUCH
if (touch && vars.touch) methods.touch();

// FADE&&SMOOTHHEIGHT || SLIDE:
if (!fade || (fade && vars.smoothHeight)) $(window).bind("resize focus", methods.resize);


// API: start() Callback
setTimeout(function(){
vars.start(slider);
}, 200);
},
asNav: {
setup: function() {
slider.asNav = true;
slider.animatingTo = Math.floor(slider.currentSlide/slider.move);
slider.currentItem = slider.currentSlide;
slider.slides.removeClass(namespace + "active-slide").eq(slider.currentItem).addClass(namespace + "active-slide");
slider.slides.click(function(e){
e.preventDefault();
var $slide = $(this),
target = $slide.index();
if (!$(vars.asNavFor).data('flexslider').animating && !$slide.hasClass('active')) {
slider.direction = (slider.currentItem < target) ? "next" : "prev";
slider.flexAnimate(target, vars.pauseOnAction, false, true, true);
}
});
}
},
controlNav: {
setup: function() {
if (!slider.manualControls) {
methods.controlNav.setupPaging();
} else { // MANUALCONTROLS:
methods.controlNav.setupManual();
}
},
setupPaging: function() {
var type = (vars.controlNav === "thumbnails") ? 'control-thumbs' : 'control-paging',
j = 1,
item;

slider.controlNavScaffold = $('<ol class="'+ namespace + 'control-nav ' + namespace + type + '"></ol>');

if (slider.pagingCount > 1) {
for (var i = 0; i < slider.pagingCount; i++) {
item = (vars.controlNav === "thumbnails") ? '<img src="' + slider.slides.eq(i).attr("data-thumb") + '"/>' : '<a>' + j + '</a>';
slider.controlNavScaffold.append('<li>' + item + '</li>');
j++;
}
}

// CONTROLSCONTAINER:
(slider.controlsContainer) ? $(slider.controlsContainer).append(slider.controlNavScaffold) : slider.append(slider.controlNavScaffold);
methods.controlNav.set();

methods.controlNav.active();

slider.controlNavScaffold.delegate('a, img', eventType, function(event) {
event.preventDefault();
var $this = $(this),
target = slider.controlNav.index($this);

if (!$this.hasClass(namespace + 'active')) {
slider.direction = (target > slider.currentSlide) ? "next" : "prev";
slider.flexAnimate(target, vars.pauseOnAction);
}
});
// Prevent iOS click event bug
if (touch) {
slider.controlNavScaffold.delegate('a', "click touchstart", function(event) {
event.preventDefault();
});
}
},
setupManual: function() {
slider.controlNav = slider.manualControls;
methods.controlNav.active();

slider.controlNav.live(eventType, function(event) {
event.preventDefault();
var $this = $(this),
target = slider.controlNav.index($this);

if (!$this.hasClass(namespace + 'active')) {
(target > slider.currentSlide) ? slider.direction = "next" : slider.direction = "prev";
slider.flexAnimate(target, vars.pauseOnAction);
}
});
// Prevent iOS click event bug
if (touch) {
slider.controlNav.live("click touchstart", function(event) {
event.preventDefault();
});
}
},
set: function() {
var selector = (vars.controlNav === "thumbnails") ? 'img' : 'a';
slider.controlNav = $('.' + namespace + 'control-nav li ' + selector, (slider.controlsContainer) ? slider.controlsContainer : slider);
},
active: function() {
slider.controlNav.removeClass(namespace + "active").eq(slider.animatingTo).addClass(namespace + "active");
},
update: function(action, pos) {
if (slider.pagingCount > 1 && action === "add") {
slider.controlNavScaffold.append($('<li><a>' + slider.count + '</a></li>'));
} else if (slider.pagingCount === 1) {
slider.controlNavScaffold.find('li').remove();
} else {
slider.controlNav.eq(pos).closest('li').remove();
}
methods.controlNav.set();
(slider.pagingCount > 1 && slider.pagingCount !== slider.controlNav.length) ? slider.update(pos, action) : methods.controlNav.active();
}
},
directionNav: {
setup: function() {
var directionNavScaffold = $('<ul class="' + namespace + 'direction-nav"><li><a class="' + namespace + 'prev" href="#">' + vars.prevText + '</a></li><li><a class="' + namespace + 'next" href="#">' + vars.nextText + '</a></li></ul>');

// CONTROLSCONTAINER:
if (slider.controlsContainer) {
$(slider.controlsContainer).append(directionNavScaffold);
slider.directionNav = $('.' + namespace + 'direction-nav li a', slider.controlsContainer);
} else {
slider.append(directionNavScaffold);
slider.directionNav = $('.' + namespace + 'direction-nav li a', slider);
}

methods.directionNav.update();

slider.directionNav.bind(eventType, function(event) {
event.preventDefault();
var target = ($(this).hasClass(namespace + 'next')) ? slider.getTarget('next') : slider.getTarget('prev');
slider.flexAnimate(target, vars.pauseOnAction);
});
// Prevent iOS click event bug
if (touch) {
slider.directionNav.bind("click touchstart", function(event) {
event.preventDefault();
});
}
},
update: function() {
var disabledClass = namespace + 'disabled';
if (slider.pagingCount === 1) {
slider.directionNav.addClass(disabledClass);
} else if (!vars.animationLoop) {
if (slider.animatingTo === 0) {
slider.directionNav.removeClass(disabledClass).filter('.' + namespace + "prev").addClass(disabledClass);
} else if (slider.animatingTo === slider.last) {
slider.directionNav.removeClass(disabledClass).filter('.' + namespace + "next").addClass(disabledClass);
} else {
slider.directionNav.removeClass(disabledClass);
}
} else {
slider.directionNav.removeClass(disabledClass);
}
}
},
pausePlay: {
setup: function() {
var pausePlayScaffold = $('<div class="' + namespace + 'pauseplay"><a></a></div>');

// CONTROLSCONTAINER:
if (slider.controlsContainer) {
slider.controlsContainer.append(pausePlayScaffold);
slider.pausePlay = $('.' + namespace + 'pauseplay a', slider.controlsContainer);
} else {
slider.append(pausePlayScaffold);
slider.pausePlay = $('.' + namespace + 'pauseplay a', slider);
}

methods.pausePlay.update((vars.slideshow) ? namespace + 'pause' : namespace + 'play');

slider.pausePlay.bind(eventType, function(event) {
event.preventDefault();
if ($(this).hasClass(namespace + 'pause')) {
slider.manualPause = true;
slider.manualPlay = false;
slider.pause();
} else {
slider.manualPause = false;
slider.manualPlay = true;
slider.play();
}
});
// Prevent iOS click event bug
if (touch) {
slider.pausePlay.bind("click touchstart", function(event) {
event.preventDefault();
});
}
},
update: function(state) {
(state === "play") ? slider.pausePlay.removeClass(namespace + 'pause').addClass(namespace + 'play').text(vars.playText) : slider.pausePlay.removeClass(namespace + 'play').addClass(namespace + 'pause').text(vars.pauseText);
}
},
touch: function() {
var startX,
startY,
offset,
cwidth,
dx,
startT,
scrolling = false;

el.addEventListener('touchstart', onTouchStart, false);
function onTouchStart(e) {
if (slider.animating) {
e.preventDefault();
} else if (e.touches.length === 1) {
slider.pause();
// CAROUSEL:
cwidth = (vertical) ? slider.h : slider. w;
startT = Number(new Date());
// CAROUSEL:
offset = (carousel && reverse && slider.animatingTo === slider.last) ? 0 :
(carousel && reverse) ? slider.limit - (((slider.itemW + vars.itemMargin) * slider.move) * slider.animatingTo) :
(carousel && slider.currentSlide === slider.last) ? slider.limit :
(carousel) ? ((slider.itemW + vars.itemMargin) * slider.move) * slider.currentSlide :
(reverse) ? (slider.last - slider.currentSlide + slider.cloneOffset) * cwidth : (slider.currentSlide + slider.cloneOffset) * cwidth;
startX = (vertical) ? e.touches[0].pageY : e.touches[0].pageX;
startY = (vertical) ? e.touches[0].pageX : e.touches[0].pageY;

el.addEventListener('touchmove', onTouchMove, false);
el.addEventListener('touchend', onTouchEnd, false);
}
}

function onTouchMove(e) {
dx = (vertical) ? startX - e.touches[0].pageY : startX - e.touches[0].pageX;
scrolling = (vertical) ? (Math.abs(dx) < Math.abs(e.touches[0].pageX - startY)) : (Math.abs(dx) < Math.abs(e.touches[0].pageY - startY));

if (!scrolling || Number(new Date()) - startT > 500) {
e.preventDefault();
if (!fade && slider.transitions) {
if (!vars.animationLoop) {
dx = dx/((slider.currentSlide === 0 && dx < 0 || slider.currentSlide === slider.last && dx > 0) ? (Math.abs(dx)/cwidth+2) : 1);
}
slider.setProps(offset + dx, "setTouch");
}
}
}

function onTouchEnd(e) {
if (slider.animatingTo === slider.currentSlide && !scrolling && !(dx === null)) {
var updateDx = (reverse) ? -dx : dx,
target = (updateDx > 0) ? slider.getTarget('next') : slider.getTarget('prev');

if (slider.canAdvance(target) && (Number(new Date()) - startT < 550 && Math.abs(updateDx) > 50 || Math.abs(updateDx) > cwidth/2)) {
slider.flexAnimate(target, vars.pauseOnAction);
} else {
slider.flexAnimate(slider.currentSlide, vars.pauseOnAction, true);
}
}
// finish the touch by undoing the touch session
el.removeEventListener('touchmove', onTouchMove, false);
el.removeEventListener('touchend', onTouchEnd, false);
startX = null;
startY = null;
dx = null;
offset = null;
}
},
resize: function() {
if (!slider.animating && slider.is(':visible')) {
if (!carousel) slider.doMath();

if (fade) {
// SMOOTH HEIGHT:
methods.smoothHeight();
} else if (carousel) { //CAROUSEL:
slider.slides.width(slider.computedW);
slider.update(slider.pagingCount);
slider.setProps();
}
else if (vertical) { //VERTICAL:
slider.viewport.height(slider.h);
slider.setProps(slider.h, "setTotal");
} else {
// SMOOTH HEIGHT:
if (vars.smoothHeight) methods.smoothHeight();
slider.newSlides.width(slider.computedW);
slider.setProps(slider.computedW, "setTotal");
}
}
},
smoothHeight: function(dur) {
if (!vertical || fade) {
var $obj = (fade) ? slider : slider.viewport;
(dur) ? $obj.animate({"height": slider.slides.eq(slider.animatingTo).height()}, dur) : $obj.height(slider.slides.eq(slider.animatingTo).height());
}
},
sync: function(action) {
var $obj = $(vars.sync).data("flexslider"),
target = slider.animatingTo;

switch (action) {
case "animate": $obj.flexAnimate(target, vars.pauseOnAction, false, true); break;
case "play": if (!$obj.playing && !$obj.asNav) { $obj.play(); } break;
case "pause": $obj.pause(); break;
}
}
}

// public methods
slider.flexAnimate = function(target, pause, override, withSync, fromNav) {
if (asNav && slider.pagingCount === 1) slider.direction = (slider.currentItem < target) ? "next" : "prev";

if (!slider.animating && (slider.canAdvance(target, fromNav) || override) && slider.is(":visible")) {
if (asNav && withSync) {
var master = $(vars.asNavFor).data('flexslider');
slider.atEnd = target === 0 || target === slider.count - 1;
master.flexAnimate(target, true, false, true, fromNav);
slider.direction = (slider.currentItem < target) ? "next" : "prev";
master.direction = slider.direction;

if (Math.ceil((target + 1)/slider.visible) - 1 !== slider.currentSlide && target !== 0) {
slider.currentItem = target;
slider.slides.removeClass(namespace + "active-slide").eq(target).addClass(namespace + "active-slide");
target = Math.floor(target/slider.visible);
} else {
slider.currentItem = target;
slider.slides.removeClass(namespace + "active-slide").eq(target).addClass(namespace + "active-slide");
return false;
}
}

slider.animating = true;
slider.animatingTo = target;
// API: before() animation Callback
vars.before(slider);

// SLIDESHOW:
if (pause) slider.pause();

// SYNC:
if (slider.syncExists && !fromNav) methods.sync("animate");

// CONTROLNAV
if (vars.controlNav) methods.controlNav.active();

// !CAROUSEL:
// CANDIDATE: slide active class (for add/remove slide)
if (!carousel) slider.slides.removeClass(namespace + 'active-slide').eq(target).addClass(namespace + 'active-slide');

// INFINITE LOOP:
// CANDIDATE: atEnd
slider.atEnd = target === 0 || target === slider.last;

// DIRECTIONNAV:
if (vars.directionNav) methods.directionNav.update();

if (target === slider.last) {
// API: end() of cycle Callback
vars.end(slider);
// SLIDESHOW && !INFINITE LOOP:
if (!vars.animationLoop) slider.pause();
}

// SLIDE:
if (!fade) {
var dimension = (vertical) ? slider.slides.filter(':first').height() : slider.computedW,
margin, slideString, calcNext;

// INFINITE LOOP / REVERSE:
if (carousel) {
margin = (vars.itemWidth > slider.w) ? vars.itemMargin * 2 : vars.itemMargin;
calcNext = ((slider.itemW + margin) * slider.move) * slider.animatingTo;
slideString = (calcNext > slider.limit && slider.visible !== 1) ? slider.limit : calcNext;
} else if (slider.currentSlide === 0 && target === slider.count - 1 && vars.animationLoop && slider.direction !== "next") {
slideString = (reverse) ? (slider.count + slider.cloneOffset) * dimension : 0;
} else if (slider.currentSlide === slider.last && target === 0 && vars.animationLoop && slider.direction !== "prev") {
slideString = (reverse) ? 0 : (slider.count + 1) * dimension;
} else {
slideString = (reverse) ? ((slider.count - 1) - target + slider.cloneOffset) * dimension : (target + slider.cloneOffset) * dimension;
}
slider.setProps(slideString, "", vars.animationSpeed);
if (slider.transitions) {
if (!vars.animationLoop || !slider.atEnd) {
slider.animating = false;
slider.currentSlide = slider.animatingTo;
}
slider.container.unbind("webkitTransitionEnd transitionend");
slider.container.bind("webkitTransitionEnd transitionend", function() {
slider.wrapup(dimension);
});
} else {
slider.container.animate(slider.args, vars.animationSpeed, vars.easing, function(){
slider.wrapup(dimension);
});
}
} else { // FADE:
slider.slides.eq(slider.currentSlide).fadeOut(vars.animationSpeed, vars.easing);
slider.slides.eq(target).fadeIn(vars.animationSpeed, vars.easing, slider.wrapup);
}
// SMOOTH HEIGHT:
if (vars.smoothHeight) methods.smoothHeight(vars.animationSpeed);
}
}
slider.wrapup = function(dimension) {
// SLIDE:
if (!fade && !carousel) {
if (slider.currentSlide === 0 && slider.animatingTo === slider.last && vars.animationLoop) {
slider.setProps(dimension, "jumpEnd");
} else if (slider.currentSlide === slider.last && slider.animatingTo === 0 && vars.animationLoop) {
slider.setProps(dimension, "jumpStart");
}
}
slider.animating = false;
slider.currentSlide = slider.animatingTo;
// API: after() animation Callback
vars.after(slider);
}

// SLIDESHOW:
slider.animateSlides = function() {
if (!slider.animating) slider.flexAnimate(slider.getTarget("next"));
}
// SLIDESHOW:
slider.pause = function() {
clearInterval(slider.animatedSlides);
slider.playing = false;
// PAUSEPLAY:
if (vars.pausePlay) methods.pausePlay.update("play");
// SYNC:
if (slider.syncExists) methods.sync("pause");
}
// SLIDESHOW:
slider.play = function() {
slider.animatedSlides = setInterval(slider.animateSlides, vars.slideshowSpeed);
slider.playing = true;
// PAUSEPLAY:
if (vars.pausePlay) methods.pausePlay.update("pause");
// SYNC:
if (slider.syncExists) methods.sync("play");
}
slider.canAdvance = function(target, fromNav) {
// ASNAV:
var last = (asNav) ? slider.pagingCount - 1 : slider.last;
return (fromNav) ? true :
(asNav && slider.currentItem === slider.count - 1 && target === 0 && slider.direction === "prev") ? true :
(asNav && slider.currentItem === 0 && target === slider.pagingCount - 1 && slider.direction !== "next") ? false :
(target === slider.currentSlide && !asNav) ? false :
(vars.animationLoop) ? true :
(slider.atEnd && slider.currentSlide === 0 && target === last && slider.direction !== "next") ? false :
(slider.atEnd && slider.currentSlide === last && target === 0 && slider.direction === "next") ? false :
true;
}
slider.getTarget = function(dir) {
slider.direction = dir;
if (dir === "next") {
return (slider.currentSlide === slider.last) ? 0 : slider.currentSlide + 1;
} else {
return (slider.currentSlide === 0) ? slider.last : slider.currentSlide - 1;
}
}

// SLIDE:
slider.setProps = function(pos, special, dur) {
var target = (function() {
var posCheck = (pos) ? pos : ((slider.itemW + vars.itemMargin) * slider.move) * slider.animatingTo,
posCalc = (function() {
if (carousel) {
return (special === "setTouch") ? pos :
(reverse && slider.animatingTo === slider.last) ? 0 :
(reverse) ? slider.limit - (((slider.itemW + vars.itemMargin) * slider.move) * slider.animatingTo) :
(slider.animatingTo === slider.last) ? slider.limit : posCheck;
} else {
switch (special) {
case "setTotal": return (reverse) ? ((slider.count - 1) - slider.currentSlide + slider.cloneOffset) * pos : (slider.currentSlide + slider.cloneOffset) * pos;
case "setTouch": return (reverse) ? pos : pos;
case "jumpEnd": return (reverse) ? pos : slider.count * pos;
case "jumpStart": return (reverse) ? slider.count * pos : pos;
default: return pos;
}
}
}());
return (posCalc * -1) + "px";
}());

if (slider.transitions) {
target = (vertical) ? "translate3d(0," + target + ",0)" : "translate3d(" + target + ",0,0)";
dur = (dur !== undefined) ? (dur/1000) + "s" : "0s";
slider.container.css("-" + slider.pfx + "-transition-duration", dur);
}

slider.args[slider.prop] = target;
if (slider.transitions || dur === undefined) slider.container.css(slider.args);
}

slider.setup = function(type) {
// SLIDE:
if (!fade) {
var sliderOffset, arr;

if (type === "init") {
slider.viewport = $('<div class="' + namespace + 'viewport"></div>').css({"overflow": "hidden", "position": "relative"}).appendTo(slider).append(slider.container);
// INFINITE LOOP:
slider.cloneCount = 0;
slider.cloneOffset = 0;
// REVERSE:
if (reverse) {
arr = $.makeArray(slider.slides).reverse();
slider.slides = $(arr);
slider.container.empty().append(slider.slides);
}
}
// INFINITE LOOP && !CAROUSEL:
if (vars.animationLoop && !carousel) {
slider.cloneCount = 2;
slider.cloneOffset = 1;
// clear out old clones
if (type !== "init") slider.container.find('.clone').remove();
slider.container.append(slider.slides.first().clone().addClass('clone')).prepend(slider.slides.last().clone().addClass('clone'));
}
slider.newSlides = $(vars.selector, slider);

sliderOffset = (reverse) ? slider.count - 1 - slider.currentSlide + slider.cloneOffset : slider.currentSlide + slider.cloneOffset;
// VERTICAL:
if (vertical && !carousel) {
slider.container.height((slider.count + slider.cloneCount) * 200 + "%").css("position", "absolute").width("100%");
setTimeout(function(){
slider.newSlides.css({"display": "block"});
slider.doMath();
slider.viewport.height(slider.h);
slider.setProps(sliderOffset * slider.h, "init");
}, (type === "init") ? 100 : 0);
} else {
slider.container.width((slider.count + slider.cloneCount) * 200 + "%");
slider.setProps(sliderOffset * slider.computedW, "init");
setTimeout(function(){
slider.doMath();
slider.newSlides.css({"width": slider.computedW, "float": "left", "display": "block"});
// SMOOTH HEIGHT:
if (vars.smoothHeight) methods.smoothHeight();
}, (type === "init") ? 100 : 0);
}
} else { // FADE:
slider.slides.css({"width": "100%", "float": "left", "marginRight": "-100%", "position": "relative"});
if (type === "init") slider.slides.eq(slider.currentSlide).fadeIn(vars.animationSpeed, vars.easing);
// SMOOTH HEIGHT:
if (vars.smoothHeight) methods.smoothHeight();
}
// !CAROUSEL:
// CANDIDATE: active slide
if (!carousel) slider.slides.removeClass(namespace + "active-slide").eq(slider.currentSlide).addClass(namespace + "active-slide");
}

slider.doMath = function() {
var slide = slider.slides.first(),
slideMargin = vars.itemMargin,
minItems = vars.minItems,
maxItems = vars.maxItems;

slider.w = slider.width();
slider.h = slide.height();
slider.boxPadding = slide.outerWidth() - slide.width();

// CAROUSEL:
if (carousel) {
slider.itemT = vars.itemWidth + slideMargin;
slider.minW = (minItems) ? minItems * slider.itemT : slider.w;
slider.maxW = (maxItems) ? maxItems * slider.itemT : slider.w;
slider.itemW = (slider.minW > slider.w) ? (slider.w - (slideMargin * minItems))/minItems :
(slider.maxW < slider.w) ? (slider.w - (slideMargin * maxItems))/maxItems :
(vars.itemWidth > slider.w) ? slider.w : vars.itemWidth;
slider.visible = Math.floor(slider.w/(slider.itemW + slideMargin));
slider.move = (vars.move > 0 && vars.move < slider.visible ) ? vars.move : slider.visible;
slider.pagingCount = Math.ceil(((slider.count - slider.visible)/slider.move) + 1);
slider.last = slider.pagingCount - 1;
slider.limit = (slider.pagingCount === 1) ? 0 :
(vars.itemWidth > slider.w) ? ((slider.itemW + (slideMargin * 2)) * slider.count) - slider.w - slideMargin : ((slider.itemW + slideMargin) * slider.count) - slider.w - slideMargin;
} else {
slider.itemW = slider.w;
slider.pagingCount = slider.count;
slider.last = slider.count - 1;
}
slider.computedW = slider.itemW - slider.boxPadding;
}

slider.update = function(pos, action) {
slider.doMath();

// update currentSlide and slider.animatingTo if necessary
if (!carousel) {
if (pos < slider.currentSlide) {
slider.currentSlide += 1;
} else if (pos <= slider.currentSlide && pos !== 0) {
slider.currentSlide -= 1;
}
slider.animatingTo = slider.currentSlide;
}

// update controlNav
if (vars.controlNav && !slider.manualControls) {
if ((action === "add" && !carousel) || slider.pagingCount > slider.controlNav.length) {
methods.controlNav.update("add");
} else if ((action === "remove" && !carousel) || slider.pagingCount < slider.controlNav.length) {
if (carousel && slider.currentSlide > slider.last) {
slider.currentSlide -= 1;
slider.animatingTo -= 1;
}
methods.controlNav.update("remove", slider.last);
}
}
// update directionNav
if (vars.directionNav) methods.directionNav.update();

}

slider.addSlide = function(obj, pos) {
var $obj = $(obj);

slider.count += 1;
slider.last = slider.count - 1;

// append new slide
if (vertical && reverse) {
(pos !== undefined) ? slider.slides.eq(slider.count - pos).after($obj) : slider.container.prepend($obj);
} else {
(pos !== undefined) ? slider.slides.eq(pos).before($obj) : slider.container.append($obj);
}

// update currentSlide, animatingTo, controlNav, and directionNav
slider.update(pos, "add");

// update slider.slides
slider.slides = $(vars.selector + ':not(.clone)', slider);
// re-setup the slider to accomdate new slide
slider.setup();

//FlexSlider: added() Callback
vars.added(slider);
}
slider.removeSlide = function(obj) {
var pos = (isNaN(obj)) ? slider.slides.index($(obj)) : obj;

// update count
slider.count -= 1;
slider.last = slider.count - 1;

// remove slide
if (isNaN(obj)) {
$(obj, slider.slides).remove();
} else {
(vertical && reverse) ? slider.slides.eq(slider.last).remove() : slider.slides.eq(obj).remove();
}

// update currentSlide, animatingTo, controlNav, and directionNav
slider.doMath();
slider.update(pos, "remove");

// update slider.slides
slider.slides = $(vars.selector + ':not(.clone)', slider);
// re-setup the slider to accomdate new slide
slider.setup();

// FlexSlider: removed() Callback
vars.removed(slider);
}

//FlexSlider: Initialize
methods.init();
}

//FlexSlider: Default Settings
$.flexslider.defaults = {
namespace: "flex-", //{NEW} String: Prefix string attached to the class of every element generated by the plugin
selector: ".slides > li", //{NEW} Selector: Must match a simple pattern. '{container} > {slide}' -- Ignore pattern at your own peril
animation: "fade", //String: Select your animation type, "fade" or "slide"
easing: "swing", //{NEW} String: Determines the easing method used in jQuery transitions. jQuery easing plugin is supported!
direction: "horizontal", //String: Select the sliding direction, "horizontal" or "vertical"
reverse: false, //{NEW} Boolean: Reverse the animation direction
animationLoop: true, //Boolean: Should the animation loop? If false, directionNav will received "disable" classes at either end
smoothHeight: false, //{NEW} Boolean: Allow height of the slider to animate smoothly in horizontal mode
startAt: 0, //Integer: The slide that the slider should start on. Array notation (0 = first slide)
slideshow: true, //Boolean: Animate slider automatically
slideshowSpeed: 7000, //Integer: Set the speed of the slideshow cycling, in milliseconds
animationSpeed: 600, //Integer: Set the speed of animations, in milliseconds
initDelay: 0, //{NEW} Integer: Set an initialization delay, in milliseconds
randomize: false, //Boolean: Randomize slide order

// Usability features
pauseOnAction: true, //Boolean: Pause the slideshow when interacting with control elements, highly recommended.
pauseOnHover: false, //Boolean: Pause the slideshow when hovering over slider, then resume when no longer hovering
useCSS: true, //{NEW} Boolean: Slider will use CSS3 transitions if available
touch: true, //{NEW} Boolean: Allow touch swipe navigation of the slider on touch-enabled devices
video: false, //{NEW} Boolean: If using video in the slider, will prevent CSS3 3D Transforms to avoid graphical glitches

// Primary Controls
controlNav: true, //Boolean: Create navigation for paging control of each clide? Note: Leave true for manualControls usage
directionNav: true, //Boolean: Create navigation for previous/next navigation? (true/false)
prevText: "Previous", //String: Set the text for the "previous" directionNav item
nextText: "Next", //String: Set the text for the "next" directionNav item

// Secondary Navigation
keyboard: true, //Boolean: Allow slider navigating via keyboard left/right keys
multipleKeyboard: false, //{NEW} Boolean: Allow keyboard navigation to affect multiple sliders. Default behavior cuts out keyboard navigation with more than one slider present.
mousewheel: false, //{UPDATED} Boolean: Requires jquery.mousewheel.js (https://github.com/brandonaaron/jquery-mousewheel) - Allows slider navigating via mousewheel
pausePlay: false, //Boolean: Create pause/play dynamic element
pauseText: "Pause", //String: Set the text for the "pause" pausePlay item
playText: "Play", //String: Set the text for the "play" pausePlay item

// Special properties
controlsContainer: "", //{UPDATED} jQuery Object/Selector: Declare which container the navigation elements should be appended too. Default container is the FlexSlider element. Example use would be $(".flexslider-container"). Property is ignored if given element is not found.
manualControls: "", //{UPDATED} jQuery Object/Selector: Declare custom control navigation. Examples would be $(".flex-control-nav li") or "#tabs-nav li img", etc. The number of elements in your controlNav should match the number of slides/tabs.
sync: "", //{NEW} Selector: Mirror the actions performed on this slider with another slider. Use with care.
asNavFor: "", //{NEW} Selector: Internal property exposed for turning the slider into a thumbnail navigation for another slider

// Carousel Options
itemWidth: 0, //{NEW} Integer: Box-model width of individual carousel items, including horizontal borders and padding.
itemMargin: 0, //{NEW} Integer: Margin between carousel items.
minItems: 0, //{NEW} Integer: Minimum number of carousel items that should be visible. Items will resize fluidly when below this.
maxItems: 0, //{NEW} Integer: Maximum number of carousel items that should be visible. Items will resize fluidly when above this limit.
move: 0, //{NEW} Integer: Number of carousel items that should move on animation. If 0, slider will move all visible items.

// Callback API
start: function(){}, //Callback: function(slider) - Fires when the slider loads the first slide
before: function(){}, //Callback: function(slider) - Fires asynchronously with each slider animation
after: function(){}, //Callback: function(slider) - Fires after each slider animation completes
end: function(){}, //Callback: function(slider) - Fires when the slider reaches the last slide (asynchronous)
added: function(){}, //{NEW} Callback: function(slider) - Fires after a slide is added
removed: function(){} //{NEW} Callback: function(slider) - Fires after a slide is removed
}

//FlexSlider: Plugin Function
$.fn.flexslider = function(options) {
if (options === undefined) options = {};

if (typeof options === "object") {
return this.each(function() {
var $this = $(this),
selector = (options.selector) ? options.selector : ".slides > li",
$slides = $this.find(selector);

if ($slides.length === 1) {
$slides.fadeIn(400);
if (options.start) options.start($this);
} else if ($this.data('flexslider') === undefined) {
new $.flexslider(this, options);
}
});
} else {
// Helper strings to quickly perform functions on the slider
var $slider = $(this).data('flexslider');
switch (options) {
case "play": $slider.play(); break;
case "pause": $slider.pause(); break;
case "next": $slider.flexAnimate($slider.getTarget("next"), true); break;
case "prev":
case "previous": $slider.flexAnimate($slider.getTarget("prev"), true); break;
default: if (typeof options === "number") $slider.flexAnimate(options, true);
}
}
}

})(jQuery);