2010_q3_9-25曾顺-html5介绍

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1、内容简介HTML5概述HTML5绘图和动画HTML5多媒体HTML5本地存储HTML5表单HTML5其它特性HTML5概述HTML5於2004年被WHATWG（网页超文本技术工作小组）提出，於2007年被W3C接纳在2008年1月22日，第一份正式草案已公布。WHATWG表示该规范是目前正在进行的工作，仍须多年的努力HTML2.01995.11RFCHTML3.21996.1W3CHTML4.01997.12W3CHTML4.011999.12W3CHTML52008.1W3CHTML5新特点强大的绘图、动画多媒体的直接支持本地存储表单的全新属性地

2、理定位的API便捷的标签书写便捷的标签书写HTML4HTML5HTML4HTML5HTML4HTML5标签的增删一些过时的标签在HTML5中被删除，例如、、等新增了<section>、<nav>、<article>、<aside>、<hgroup>、<header>、<footer>、<time>、<mark>等标签语义更清晰，更利于搜索引擎浏览器的支持主流的浏览器已经基本支持HTML5和CSS3支持的程度如上图，基本上从左到右递减但IE9beta的发布（2010年9月）依然让人兴奋http://www.</p><p>4、findmebyip.com/HTML5绘图和动画<canvas>标签是HTML5的重磅特色在页面圈出一块画布，javascript绘制矢量图提供一系列API，实现像素级的控制配合javascript时间控制，实现动画<canvas>绘图在页面圈出一块画布，用javascript绘制矢量图xyheightwidthfillRect(100,50,200,150)50100宽200高150(0,0)<canvas>绘图<canvas>绘图<canvas>读取位图除了绘制矢量图，<canvas>同样可以控制位图，并实现像素级控制。在线绘图器示例：htt</p><p>5、p://mugtug.com/sketchpad/HTML5动画利于javascript的setTimeout或者setInterval，定时重绘<canvas>，实现动画效果例如最简单的时钟，每秒重绘一次复杂一些的，根据鼠标、键盘等事件，进行重绘HTML5多媒体在HTML4.01时代，多媒体是通过第三方插件来实现的，例如QuickTime、RealPlayer、Flash等而HTML5则推出了全新的<video>、<audio>标签IE9.0Firefox3.5OperaChromeSafari4√√√√√多媒体格式IE9.0Firefox3.5</p><p>6、OperaChromeSafari4H.264√××√√Ogg×√√√×WebM××√√×mp3√××√√wav×√√×√ogg×√√√×<source>标签<videoid="movie"width="320"height="240><sourcesrc="pr6.mp4"type='video/mp4'/><sourcesrc="pr6.webm"type='video/webm'/><sourcesrc="pr6.ogv"type='video/ogg'/>您的浏览器不兼容，时代在发展</video><videoid="movie"width</p><p>7、="320"height="240><sourcesrc="pr6.mp4"type='video/mp4'/><sourcesrc="pr6.webm"type='video/webm'/><object>Flash在这里…</object></video>多媒体配合<canvas>像控制位图一样，将video写入到<canvas>当中HTML5表单HTML5融入了WebForms2.0的一系列新表单元素包括search、email、date、number、placeholder等目前支持最好的是Opera（但不支持placeholder）<in</p><p>8、puttype="date"><inputplaceholder="entertest">HTML5表单很多新表单元素，在</p> 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