<!DOCTYPE html><html><head><meta charset="utf-8" /><title>HTML5</title><style type="text/css">#a3{width:50px; height:50px; background-color:#000066;margin:200px 0 0 200px;color:#FFF;}@-webkit-keyframes aa1{ 0%{-webkit-transform:rotate(0deg) scale(1,1) skew(0deg,0deg);opacity:1;} 50%{-webkit-transform:rotate(180deg) scale(2,2) skew(45deg,0deg);opacity:0;} 100%{-webkit-transform:rotate(360deg) scale(1,1) skew(0deg,0deg);opacity:1;}}@-moz-keyframes aa1{ 0%{-moz-transform:rotate(0deg) scale(1,1) skew(0deg,0deg);opacity:1;} 50%{-moz-transform:rotate(180deg) scale(2,2) skew(45deg,0deg);opacity:0;} 100%{-moz-transform:rotate(360deg) scale(1,1) skew(0deg,0deg);opacity:1;}}.a3:hover{ -webkit-animation-name:aa1; -webkit-animation-duration:5s; -webkit-animation-timing-function:linear; -webkit-animation-iteration-count:infinite; -moz-animation-name:aa1; -moz-animation-duration:5s; -moz-animation-timing-function:linear; -moz-animation-iteration-count:infinite;}.a5{ -webkit-animation-name:aa1; -webkit-animation-duration:5s; -webkit-animation-timing-function:linear; -webkit-animation-iteration-count:infinite; -moz-animation-name:aa1; -moz-animation-duration:5s; -moz-animation-timing-function:linear; -moz-animation-iteration-count:infinite;}</style></head><body><div id="a3">123456</div></body><script>var a = document.getElementById("a3");a.addEventListener("click",function(){ //alert("a5"); //a.style.cssText = "-webkit-animation-name:aa1;-webkit-animation-duration:5s;-webkit-animation-timing-function:linear;-webkit-animation-iteration-count:infinite;"; a.className = "a5";});</script></html>
。。。我表示all OK LZ赶紧重装吧
额。。。你的JS咋都写到body外面去了 太嚣张了 难怪出错