千丝海阁

昨天刚发了一文《CSS+JS让图片抖动》经过郑永的留言，今天去看了下CSS关于动画方面的知识，随手实现一下纯CSS的图片抖动，其实也就是定位改变left的值而已，不过这次tiandi没有加上鼠标经过才生效，而是让它一直这么晃着晃着，

实现方法：

1.将上文提到的以下JS内容删除：

$(".imagelogo").mouseover(function() {
	obj = $(this);
	i = 5;
	timer = null;
	clearInterval(timer);
    timer = setInterval(function(){    	
	    obj.css({"position":"relative","left":i+"px"});
		i = -i;
      },50);
});

$(".imagelogo").mouseout(function() {
	clearInterval(timer);
});

2.在CSS样式里加上以下内容：

@keyframes mylogo
{
from  {left: 5px;}
to  {left: -5px;}
}

@-moz-keyframes mylogo /* Firefox */
{
from  {left: 5px;}
to  {left: -5px;}
}

@-webkit-keyframes mylogo /* Safari 和 Chrome */
{
from  {left: 5px;}
to  {left: -5px;}
}

@-o-keyframes mylogo /* Opera */
{
from  {left: 5px;}
to  {left: -5px;}
}
.imagelogo {
	background: url(images/logo.png) no-repeat; 
	float: left;
	position:relative;
	width: 180px;
	height: 60px;
	margin: 15px 0px 0px 0px;
	padding: 0px;
	cursor: pointer;
	animation: mylogo 1s linear 0s infinite alternate;
	/* Firefox: */
	-moz-animation: mylogo 1s linear 0s infinite alternate;
	/* Safari 和 Chrome: */
	-webkit-animation: mylogo 1s linear 0s infinite alternate;
	/* Opera: */
	-o-animation: mylogo 1s linear 0s infinite alternate;
}

好了，有点像钟摆的样子了，上文的animation: mylogo 1s linear 0s infinite alternate是简写，展开后就是：

animation-name: mylogo ;
animation-duration: 1s;
animation-timing-function: linear;
animation-delay: 0s;
animation-iteration-count: infinite;
animation-direction: alternate;