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jQuery焦点图代码，幻灯片,非常不错的图片切换代码

时间：2013-08-29 09:03 来源：互联网作者：源码搜藏收藏推荐

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>An HTML5 Slideshow w/ Canvas & jQuery</title>
<style>
*{
	margin:0;
	padding:0;
}
body{
	color:#eee;
	background:url('http://www.codefans.net/jscss/demoimg/201211/bg3.jpg') repeat-x #0c0d10;
	font:13px "Lucida Sans Unicode",Arial,Helvetica,sans-serif;
}

#slideshow{
	background-color:#F5F5F5;
	border:1px solid #FFFFFF;
	height:340px;
	margin:150px auto 0;
	position:relative;
	width:640px;
	
	-moz-box-shadow:0 0 22px #111;
	-webkit-box-shadow:0 0 22px #111;
	box-shadow:0 0 22px #111;
}

#slideshow ul{
	height:320px;
	left:10px;
	list-style:none outside none;
	overflow:hidden;
	position:absolute;
	top:10px;
	width:620px;
}

#slideshow li{
	position:absolute;
	display:none;
	z-index:10;
}

#slideshow li:first-child{
	display:block;
	z-index:1000;
}

#slideshow .slideActive{
	z-index:1000;
}

#slideshow canvas{
	display:none;
	position:absolute;
	z-index:100;
}

#slideshow .arrow{
	height:86px;
	width:60px;
	position:absolute;
	background:url('http://www.codefans.net/jscss/demoimg/201211/arrows.png') no-repeat;
	top:50%;
	margin-top:-43px;
	cursor:pointer;
	z-index:5000;
}
#slideshow .previous{ background-position:left top;left:0;}
#slideshow .previous:hover{ background-position:left bottom;}
#slideshow .next{ background-position:right top;right:0;}
#slideshow .next:hover{ background-position:right bottom;}
p.tzine{
	text-align:center;
	font-size:12px;
	margin:50px;
}

p.credit{
	text-align:center;
	color:#888;
	font-size:10px;
}

p.credit a,
p.credit a:visited{
	color:#ccc;
	border-bottom-color:#aaa;
}

p.credit a:hover{
	border-bottom-color:transparent;
}

a, a:visited {
	text-decoration:none;
	outline:none;
	border-bottom:1px dotted #97cae6;
	color:#97cae6;
}

a:hover{
	border-bottom:1px dashed transparent;
}

.clear{
	clear:both;
}
</style>
</head>
<body>
<div id="slideshow">
	<ul class="slides">
    	<li><img src="http://i.gtimg.cn/qqlive/images/20130729/i1375084160_1.jpg?max_age=604800" width="620" height="320" alt="Marsa Alam underawter close up" /></li>
        <li><img src="http://i.gtimg.cn/qqlive/images/20130727/i1374861550_1.jpg?max_age=604800" width="620" height="320" alt="Turrimetta Beach - Dawn" /></li>
        <li><img src="http://i.gtimg.cn/qqlive/images/20130726/i1374826505_1.jpg?max_age=604800" width="620" height="320" alt="Power Station" /></li>
        <li><img src="http://i.gtimg.cn/qqlive/images/20130807/i1375863226_1.jpg?max_age=604800" width="620" height="320" alt="Colors of Nature" /></li>
    </ul>

<span class="arrow previous"></span>
    <span class="arrow next"></span>
</div>  
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script>
$(window).load(function(){
	var supportCanvas = 'getContext' in document.createElement('canvas');
	var slides = $('#slideshow li'),
		current = 0,
		slideshow = {width:0,height:0};

setTimeout(function(){	
		window.console && window.console.time && console.time('Generated In');	
		if(supportCanvas){
			$('#slideshow img').each(function(){
				if(!slideshow.width){
					slideshow.width = this.width;
					slideshow.height = this.height;
				}
				createCanvasOverlay(this);
			});
		}
		window.console && window.console.timeEnd && console.timeEnd('Generated In');
		$('#slideshow .arrow').click(function(){
			var li			= slides.eq(current),
				canvas		= li.find('canvas'),
				nextIndex	= 0;
			if($(this).hasClass('next')){
				nextIndex = current >= slides.length-1 ? 0 : current+1;
			}
			else {
				nextIndex = current <= 0 ? slides.length-1 : current-1;
			}

var canvas			= document.createElement('canvas'),
		canvasContext	= canvas.getContext("2d");
		canvas.width = slideshow.width;
		canvas.height = slideshow.height;
		canvasContext.drawImage(image,0,0);
		var imageData	= canvasContext.getImageData(0,0,canvas.width,canvas.height),
			data		= imageData.data;
		for(var i = 0,z=data.length;i<z;i++){
			data[i] = ((data[i] < 128) ? (2*data[i]*data[i] / 255) : (255 - 2 * (255 - data[i]) * (255 - data[i]) / 255));
			data[++i] = ((data[i] < 128) ? (2*data[i]*data[i] / 255) : (255 - 2 * (255 - data[i]) * (255 - data[i]) / 255));
			data[++i] = ((data[i] < 128) ? (2*data[i]*data[i] / 255) : (255 - 2 * (255 - data[i]) * (255 - data[i]) / 255));
			++i;
		}
		canvasContext.putImageData(imageData,0,0);
		image.parentNode.insertBefore(canvas,image);
	}
});

$(window).load(function(){
	var timeOut = null;
	$('#slideshow .arrow').click(function(e,simulated){
		if(!simulated){			
			clearTimeout(timeOut);
		}
	});
	(function autoAdvance(){
		$('#slideshow .next').trigger('click',[true]);
		timeOut = setTimeout(autoAdvance,5000);		
	})();

});
</script>
</body>
</html>

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jQuery焦点图代码，幻灯片非常不错的图片切换代码，幻灯片，图片切换代码，使用了jQuery插件，是一个运用了HTML5技术实现的图片特效，非常棒，值得借鉴。点击运行，您可查看效果。源码搜藏网推荐. 由源码搜藏网整理,转载请注明出处https://www.codesocang.com/tx-pic/5515.html