这是一款基于HTML5的焦点图动画，它和其他焦点图不同的地方在于，它播放的不仅仅是图片，而是可以自定义控制的网页元素。它不仅在图片间切换有过渡动画效果，而且在切换时图片中的元素也将出现动画效果，比如图中的文字移动、打散、重新组合等，这款HTML5动画图片播放器算得上是高端大气上档次。

效果图：

HTML代码

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CSS代码：

这里列出的是这个焦点图相关的核心CSS代码。

.slider section {display: none;} .slider section.first {display: block;} .slider-sections, .slider-sections section {width: 861px; height: 335px;} .slider-sections {margin: 0 auto; position: relative;} .slider-sections section {position: absolute; top: 0; left: 0px; } .header-content h2 { font:400 32px/1.2 "microsoft yahei", Tahoma, arial, sans-serif; color: #fff; margin: 0 0 26px; } .header-content p { margin: 0 0 30px; } .header-content .centered-content { padding-top: 30px; padding-bottom: 10px; } .button { float: left; width: auto !important; list-style: none; } .button a, .button button, .button input { /* Standard black button */ font-size: 15px; /*font-family: 'lucida sans',arial,helvetica,sans-serif;*/ line-height: 18px; color: #fff !important; text-decoration: none; padding: 5px 14px 6px 13px; display: block; width: auto; position: relative; z-index: 2; border: none; -moz-border-radius: 3px; border-radius: 3px; cursor: pointer; background: #313131; /* Old browsers */ background: -moz-linear-gradient(top, #313131 0%, #222222 100%); /* FF3.6+ */ background: -webkit-linear-gradient(top, #313131 0%,#222222 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(top, #313131 0%,#222222 100%); /* Opera11.10+ */ background: -ms-linear-gradient(top, #313131 0%,#222222 100%); /* IE10+ */ background: linear-gradient(top, #313131 0%,#222222 100%); /* W3C */ -webkit-transition: all 0.3s ease; -moz-transition: all 0.3s ease; -o-transition: all 0.3s ease; transition: all 0.3s ease; } .button a:hover, .button input:hover, .button button:hover, .button a:focus, .button input:focus, .button button:focus { background: #464646; /* Old browsers */ background: -moz-linear-gradient(top, #464646 0%, #393939 100%); /* FF3.6+ */ background: -webkit-linear-gradient(top, #464646 0%,#393939 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(top, #464646 0%,#393939 100%); /* Opera11.10+ */ background: -ms-linear-gradient(top, #464646 0%,#393939 100%); /* IE10+ */ background: linear-gradient(top, #464646 0%,#393939 100%); /* W3C */ } header .header-content .button a, #content .button a:hover { text-decoration: none; } .header-content .beta-ribbons { position: absolute; height: 120px; width: 85px; text-indent: -200px; overflow: hidden; background: url(../images/kendo-ribbons.png) no-repeat 0 0; } .header-content .beta-ribbons.ribbon-1 { background-position: -170px 0; top: -3px; right: -145px; } .header-content p.copy .beta-ribbons.ribbon-1 { top: -135px; left: 900px; } .header-content .beta-ribbons.ribbon-4 { background-position: -255px 0; left: -62px; top: -30px; z-index: 10; text-indent: -2000px; }

JavaScript代码：

下面是这个焦点图插件的代码。

/** * @author Alexander Farkas * v. 1.22 */ (function ($) { if (!document.defaultView || !document.defaultView.getComputedStyle) { // IE6-IE8 var oldCurCSS = $.curCSS; $.curCSS = function (elem, name, force) { if (name === 'background-position') { name = 'backgroundPosition'; } if (name !== 'backgroundPosition' || !elem.currentStyle || elem.currentStyle[name]) { return oldCurCSS.apply(this, arguments); } var style = elem.style; if (!force && style && style[name]) { return style[name]; } return oldCurCSS(elem, 'backgroundPositionX', force) + ' ' + oldCurCSS(elem, 'backgroundPositionY', force); }; } var oldAnim = $.fn.animate; $.fn.animate = function (prop) { if ('background-position' in prop) { prop.backgroundPosition = prop['background-position']; delete prop['background-position']; } if ('backgroundPosition' in prop) { prop.backgroundPosition = '(' + prop.backgroundPosition; } return oldAnim.apply(this, arguments); }; function toArray(strg) { strg = strg.replace(/left|top/g, '0px'); strg = strg.replace(/right|bottom/g, '100%'); strg = strg.replace(/([0-9.]+)(s|)|$)/g, "$1px$2"); var res = strg.match(/(-?[0-9.]+)(px|%|em|pt)s(-?[0-9.]+)(px|%|em|pt)/); return [parseFloat(res[1], 10), res[2], parseFloat(res[3], 10), res[3]]; } $.fx.step.backgroundPosition = function (fx) { if (!fx.bgPosReady) { var start = $.curCSS(fx.elem, 'backgroundPosition'); if (!start) {//FF2 no inline-style fallback start = '0px 0px'; } start = toArray(start); fx.start = [start[0], start[2]]; var end = toArray(fx.end); fx.end = [end[0], end[2]]; fx.unit = [end[1], end[3]]; fx.bgPosReady = true; } //return; var nowPosX = []; nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0]; nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1]; fx.elem.style.backgroundPosition = nowPosX[0] + ' ' + nowPosX[1]; }; })(jQuery); /* tlrkSlider example usage: $("#slider").tlrkSlider({ autoStart: false, elements: { "img": {delay: 10}, "h2": {delay: 500}, ".copy": {delay: 800}, ".button": {delay: 1000} } }); to go to a specific frame: $("#slider").tlrkSlider("go", position); "position" can have one of the following values: "next", "prev", "first", "last", "+1", "-1" or a numeric value to start/stop the automatic loop: $("#slider").tlrkSlider("start"); $("#slider").tlrkSlider("stop"); to change the delay between automatic transitions: $("#slider").tlrkSlider("option", "delayAnimation", 1000); to change any option: $("#slider").tlrkSlider("option", option_name, option_value); Changing the "elements" object is not tested. Changing the following options: "navigation", "navigationClass", "framesSelector", "autoStart" won't have any effect for now. They are used only during the initialization. $("#slider").data("tlrkSlider") will return the plugin instance and the methods/properties can be accessed from there. The plugin contructor defaults are accessable through TlrkSlider.defaults The function that actually sweep the elements in/out can be overriden from TlrkSlider.prototype._animationIn and TlrkSlider.prototype._animationOut See sweepIn/sweepOut */ ;(function( $, window, document, undefined ){ // utility function that generates the "dots" navigation function generateNavigation($el, count, config) { var i, html = "", width = count * 24; html += ""; for (i = 0; i < count; i++) { html += "slide"; } html += ""; $el.append(html); } function sweepOut($el, windowWidth) { var dfr = $.Deferred(), pos = $el.position(), width = $el.width(), delta, final, options = $el.data("tlrkAnimOptions"); windowWidth = windowWidth || $(window).width(); // check if the windowWidth is passed, if not - get it delta = windowWidth - pos.left; final = -(delta); setTimeout(function(){ $el.animate({left: final, opacity: "toggle"}, options.speed, options.easing, function(){ dfr.resolve(); }); }, options.delay); return dfr.promise(); } function sweepIn($el, windowWidth, frameLeft) { var dfr = $.Deferred(), options = $el.data("tlrkAnimOptions"), positionData = $el.data("tlrkOriginalPos"), final = positionData.position.left, rightEdge; windowWidth = windowWidth || $(window).width(); // check if the windowWidth is passed, if not - get it $el.css({opacity: 0, display: "block"}); // move it outside the right edge of the screen $el.css("left", function(current){ return current + windowWidth - frameLeft; }); setTimeout(function(){ $el.animate({left: final, opacity: 1}, options.speed, options.easing, function(){ dfr.resolve(); }); }, options.delay); return dfr.promise(); } // two pass function that first iterates all the elements and gets their position/width/height // and then sets their position to absolute function absolutize($elements) { // todo - move it to separate function and do it just once // gather the original position/dimension data for all elements $elements.each(function(){ var $t = $(this); if ($t.data("tlrkOriginalPos")) return $t.data("tlrkOriginalPos", { position: $t.position(), width: $t.width(), height: $t.height(), css_pos: $t.css("position"), css_left: $t.css("left"), css_top: $t.css("top"), css_width: $t.css("width") || "auto", css_height: $t.css("height") || "auto" }); }); // set the absolute position $elements.each(function(){ var $t = $(this), opos = $t.data("tlrkOriginalPos"); $t.css({ position: "absolute", left: opos.position.left, top: opos.position.top, width: opos.width, height: opos.height }); }); } function restoreFrameElements($elements) { $elements.each(function(){ var $t = $(this), opos = $t.data("tlrkOriginalPos"); if (!opos) return $t.css({ position: opos.css_pos, left: opos.css_left, top: opos.css_top, width: opos.css_width, height: opos.css_height }); }); } var TlrkSlider = function( elem, options ){ this.elem = elem; this.$elem = $(elem); this.options = options; }; // the plugin prototype TlrkSlider.prototype = { defaults: { defaultElementOptions: { speed: 1200, easing: "easeInOutBack", // interval before the element starts moving when the fadeIn/Out functions are called // it's a good idea to give different delays for the different elements // if all have the same delay they'll start moving all together delay: 100 }, // dispose elements are these that are not included in the elements object // but affect the document flow and will be fadedIn/Out disposeDelay: 100, // delay for the dispose elements disposeSpeed: 1000, // how quickly they'll fadeOut/In delayBetweenTransition: 1000, // time between starting fadeOut and fadeIn delayAnimation: 7000, // time between auto changing the current frame loop: true, // if true when clicking next on the last frame the slider jumps to the first one autoStart: true, // start the automatic looping through the frames on init framesSelector: "section", // selector for the frames inside the slider elements: { "p": {delay: 100, speed: 1000, easing: "easeInOutBack"} }, navigation: true, // the dots navigation on the bottom navigationClass: "slider-nav", // callbacks // another way to "catch" these events is with // $(-slider-element-).bind("animationStart") animationStart: null, animationEnd: null }, init: function() { var c, e, element, $element, that = this, $firstFrame; c = this.config = $.extend({}, this.defaults, this.options); this.elem.style.position = "relative"; // make the wrapping element relative // basics this.$frames = this.$elem.find(c.framesSelector); this.framesCount = this.$frames.length; this.currentFrame = 0; this.queue = []; this._$elementsByFrame = {}; this._$disposeElementsByFrame = {}; for (i = 0; i < this.framesCount; i++) { this._$elementsByFrame[i] = this._getFrameElements(i); // cache the $elements by frame this._$disposeElementsByFrame[i] = this._getDisposeFrameElements(i); // cache the rest of the tree for each frame } if (c.navigation) { generateNavigation(this.$elem, this.framesCount, c); this.$navigation = this.$elem.find("."+c.navigationClass); } // bindings this.$elem.find(".slider-nav").delegate("a", "click", function(e){ var frame = this.getAttribute("href").split("#")[1]; that.go.call(that, frame); return false; }); this.$elem // internal bindings for the callbacks .bind("animationStart", function(){ if ($.isFunction(c.animationStart)) {c.animationStart.apply(that, arguments);} }) .bind("animationEnd", function(){ if ($.isFunction(c.animationEnd)) {c.animationEnd.apply(that, arguments);} }) ; // start animation? if (c.autoStart) { this.start(); } else { this.running = false; } return this; }, start: function(instant) { var that = this; if (this.timer) { // we'll clear the current timer window.clearTimeout(this.timer); } this.running = true; if (instant) { that.nextFrame(); } else { this.timer = window.setTimeout(function(){ that.nextFrame.call(that) }, that.config.delayAnimation); } }, stop: function() { if (!this.running) return; // we are not running this.running = false; window.clearTimeout(this.timer); }, // main function for changing frames selectFrame: function(frame, dfr) { var c = this.config, // shorthand for the config that = this, dfr = dfr || $.Deferred(), dFadeIn = $.Deferred(), dFadeOut = $.Deferred(); if (isNaN(frame) || frame < 0 || frame > this.framesCount || frame === this.currentFrame) { dfr.reject(); return dfr.promise(); } // clear the animation loop interval if the animation is running if (this.running && this.timer) { window.clearTimeout(this.timer); } // check if we are currenly running an animation. if (this.animated && this.queue.length > 0) { // wait for the last item in the queue to finish this.queue[this.queue.length-1].done(function(){ that.selectFrame(frame, dfr); // and call again the selectFrame }) return dfr.promise(); } this.animated = true; this.$elem.trigger("animationStart", [this, frame]); this.queue.push(dfr); // fade the frames dFadeOut = this._fadeOutFrame(this.currentFrame); // hide the fadetout frame dFadeOut.done(function(){ that.$frames.eq(that.currentFrame).hide(); }); window.setTimeout(function(){ // then wait delayBetweenTransition and fadeIn the new frame dFadeIn = that._fadeInFrame.call(that, frame).done(function(){ // when both the fadeIn and fadeOut are done we'll resolve the selectFrame promise $.when(dFadeOut, dFadeIn).done(function(){ that.animated = false; that.queue.shift(); that.$elem.trigger("animationEnd", [that]); that.currentFrame = frame; dfr.resolve(); }); }); }, c.delayBetweenTransition); // navigation html change if (this.config.navigation) { this.$navigation.find(".selected").removeClass("selected").end() .find("a").eq(frame).addClass("selected"); } dfr.done(function(){ // we'll resume the loop animation after the transitions are done if (that.running) { that.start(); } }); return dfr.promise(); }, _fadeFrame: function(frame, callback, direction) { var dfr = $.Deferred(), $frame = this.$frames.eq(frame), $elements = this._$elementsByFrame[frame], windowWidth = $(window).width(), // cache it before the animations, so we don't have to check it for each element i, len, that = this, elementAnimations = [], $disposeElements = this._$disposeElementsByFrame[frame], $affectedElements, frameLeft = $frame.offset().left; direction = direction || "out"; if (!$.isFunction(callback)) return; // do nothing if there's no callback passed $affectedElements = $elements.add($disposeElements); // position absolute the animation and dispose elements absolutize($affectedElements); // toggle the dispose elements if ($disposeElements.length > 0) { window.setTimeout(function(){ $disposeElements[direction === "out" ? "fadeOut" : "fadeIn"](that.config.disposeSpeed); }, this.config.disposeDelay); } // invoke the callback for each element // the callback must return a promise $elements.each(function(){ elementAnimations.push( callback.call(that, $(this), windowWidth, frameLeft) ); }); // wait for all the elements to finish their animation $.when.apply(this, elementAnimations).done(function(){ //restoreFrameElements($affectedElements); // and restore the elements' position dfr.resolve(); // resolve the fade function }); return dfr.promise(); }, _fadeOutFrame: function(frame) { var dfr = $.Deferred(), $frame = this.$frames.eq(frame), $disposeElements = this._$disposeElementsByFrame[frame]; this._fadeFrame(frame, this._animationOut, "out").done(function(){ dfr.resolve(); }) return dfr.promise(); }, _fadeInFrame: function(frame) { var dfr = $.Deferred(), $frame = this.$frames.eq(frame), $elements = this._$elementsByFrame[frame]; this._restoreFrame(frame); $frame.show(); this._fadeFrame(frame, this._animationIn, "in").done(function(){ dfr.resolve(); }); return dfr.promise(); }, _restoreFrame: function(frame){ if (!frame) return restoreFrameElements( this._$elementsByFrame[frame].add(this._$disposeElementsByFrame[frame]) ); }, nextFrame: function() { var frame = this.currentFrame+1, dfr = $.Deferred(); if (frame > this.framesCount-1) { if (this.config.loop) { frame = 0; } else { dfr.reject(); } }; this.selectFrame(frame).done(function(){ dfr.resolve(); }); return dfr.promise(); }, prevFrame: function() { var frame = this.currentFrame-1, dfr = $.Deferred(); if (frame < 0) { if (this.config.loop) { frame = this.framesCount-1; } else { dfr.reject(); return dfr.promise(); } } this.selectFrame(frame).done(function(){ dfr.resolve(); }); return dfr.promise(); }, go: function(str) { // shorthand switch (str) { case "next": case "+1": this.nextFrame(); break; case "prev": case "-1": this.prevFrame(); break; case "first": this.selectFrame(0); break; case "last": this.selectFrame(this.framesCount-1); break; default: if (isNaN(str)) return; this.selectFrame(Number(str)); } }, // returns jquery collection of animation elements _getFrameElements: function(frame) { var $frame = this.$frames.eq(frame), elements = this.config.elements, e, elementOptions, $found, $frameElements = $([]); for (e in elements) { elementOptions = elements[e]; $found = $frame.find(e); $found.addClass("t-frame-element").data("tlrkAnimOptions", $.extend({}, this.defaults.defaultElementOptions, elementOptions )); $frameElements = $frameElements.add($found); } return $frameElements; }, // returns jquery collection of elements that have to be faded out // i.e. elements on the same level as the animation elements // that doesn't contain other animation elements _getDisposeFrameElements: function(frame) { var $disposeElements = $([]), $frame = this.$frames.eq(frame), $elements = this._$elementsByFrame[frame]; $elements.each(function(){ var $t = $(this), $siblings = $t.siblings().not(".t-frame-element"); $siblings.each(function(){ var $t = $(this); // check if the node is not already marked and doesn't contains other frame elements if (!$t.hasClass("t-frame-dispose") && $t.find(".t-frame-element").length === 0) { $t.addClass("t-frame-dispose"); $disposeElements = $disposeElements.add($t); } }); }); return $disposeElements; }, // expose the internal animationIn/Out functions that are called for each element in the frame // two arguments are passed - the $element which have to be animated and the window width _animationIn: sweepIn, _animationOut: sweepOut } TlrkSlider.defaults = TlrkSlider.prototype.defaults; $.fn.tlrkSlider = function(options) { var otherArgs = Array.prototype.slice.call(arguments, 1); return this.each(function() { var $el = $(this), pluginData = $el.data("tlrkSlider"); if (!pluginData) { // check if the slider is already attached pluginData = new TlrkSlider(this, options).init(); $el.data("tlrkSlider", pluginData); return; } //change the options or call a method if (typeof options === "string") { // setting / getting option(s) if (options === "option") { if (typeof otherArgs[0] === "string" && typeof otherArgs[1] !== "undefined") { // set an option value pluginData.config[otherArgs[0]] = otherArgs[1]; } if (typeof otherArgs[0] === "object") { // extend the config with new options pluginData.config = $.extend(pluginData.config, otherArgs[0]); } } else { // call a method? try { pluginData[options].apply(pluginData, otherArgs); } catch(ex) { throw "Error calling a plugin method (" + ex + ")"; } } } }); }; window.TlrkSlider = TlrkSlider; })( jQuery, window , document );

下面是页面调用的JS代码：

$(document).ready(function(){ var $backgrounds = $(".header-content").find(".parallax-bg"), LAYER_OFFSET = 30, PRLX_SPEED = 1500, $slider; $slider = $("#slider").tlrkSlider({ autoStart: true, animationStart: function(ev, slider, step){ var max_steps = this.framesCount; $backgrounds.each(function(idx, el){ var pos = (step * (100 / max_steps)) + (LAYER_OFFSET * idx); $(this).animate({"backgroundPosition": pos + "% 0"}, PRLX_SPEED); }); }, elements: { "img": {delay: 10}, "h2": {delay: 500}, ".copy": {delay: 800}, ".button": {delay: 1000} } }); $(".header-content") .hover( function(){$(this).find(".slider-prev, .slider-next").show();}, function(){$(this).find(".slider-prev, .slider-next").hide();} ) .find(".slider-prev").click(function(){$slider.tlrkSlider("go", "prev"); return false; }).end() .find(".slider-next").click(function(){$slider.tlrkSlider("go", "next"); return false; }); });

希望本文对大家学习javascript程序设计有所帮助。