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div.trans { width:100pxheight:100pxbackground:graytransition:width 2s-moz-transition:width 2s/* Firefox 4 */ -webkit-transition:width 2s/* Safari and Chrome */ -o-transition:width 2s/* Opera */ } div.trans:hover { width:300px} div.ani { width:100pxheight:100pxbackground:redposition:relativeanimation:mymove 5s infinite-moz-animation:mymove 5s infinite/*Firefox*/ -webkit-animation:mymove 5s infinite/*Safari and Chrome*/ } @keyframes mymove { from {left:0px} to {left:200px} } @-moz-keyframes mymove /*Firefox*/ { from {left:0px} to {left:200px} } @-webkit-keyframes mymove /*Safari and Chrome*/ { from {left:0px} to {left:200px} }刚开始W3C CSS Workgroup拒绝将CSS3 transition与animation加入官方标准，一些成员认为过渡效果和动画并非样式属性，而且已经可以用脚本实现。语法：transition: property duration timing-function delay说明：ValueDescriptiontransition-property指定要改变CSS属性的名称transition-duration指定过渡效果要花多少时间(s/ms)transition-timing-function指定过渡效果的速度transition-delay定义过渡效果的延迟时间.实例：<style type="text/css">div { width:100pxheight:100pxbackground:redtransition:width 2s-moz-transition:width 2s/* Firefox 4 */ -webkit-transition:width 2s/* Safari and Chrome */ -o-transition:width 2s/* Opera */ } div:hover { width:300px} </style><div></div>2. AnimationCSS动画(Animations)简单说就是在一段固定的动画时间内暗中在某一频率内改变其CSS某个或某些值,从而达到视觉上的转换动画效果。下面看下一个简单的实例：<style type="text/css">div { width:100pxheight:100pxbackground:redposition:relativeanimation:mymove 5s infinite-moz-animation:mymove 5s infinite/*Firefox*/ -webkit-animation:mymove 5s infinite/*Safari and Chrome*/ } @keyframes mymove { from {left:0px} to {left:200px} } @-moz-keyframes mymove /*Firefox*/ { from {left:0px} to {left:200px} }@-webkit-keyframes mymove /*Safari and Chrome*/ { from {left:0px} to {left:200px} } </style><div></div>语法：animation: name duration timing-function delay iteration-count direction说明：ValueDescriptionanimation-name指定动画帧的名称animation-duration指定动画运行的时间:秒(s)和毫秒(ms)animation-timing-function指定动画运行的速度animation-delay指定动画的延迟时间animation-iteration-count指定动画的重复数animation-direction指定动画是否以相反的方向运行动画
