为什么加了clearInterval(This.time)； 之后就没有伸缩的效果了
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*{margin:0;padding:0;}
ul{list-style:none ;height:50px;padding-left:30px;border-bottom:5px solid #F90;}
a{text-decoration:none;display:block;height:30px;line-height:30px;width:120px;background-color:#C33;margin-bottom:1px;text-align:center;}
li{float:left;margin-top:20px;}
.on,a:hover{background-color:#F93;height:40px;margin-top:-10px;line-height:40px;}
</style>
<script type="text/javascript">
window.onload=function(){
var aA=document.getElementsByTagName('a');
for(var i=0;i<aA.length;i++){
aA[i].onmouseover=function(){
clearInterval(This.time);
var This=this;
This.time=setInterval(function(){
This.style.width=This.offsetWidth+8+"px";
if(This.offsetWidth>=120){
clearInterval(This.time)
}
},30)
}
aA[i].onmouseout=function(){
clearInterval(This.time)；
var This=this;
This.time=setInterval(function(){
This.style.width=This.offsetWidth+8+"px";
if(This.offsetWidth>=120){
This.style.width="120px";
clearInterval(This.time);
}
},30)
}
}
}
</script>
</head>
<body>
<ul>
<li><a class= "on"href="#">首页</a></li>
<li><a href="#">新闻快讯</a></li>
<li><a href="#">产品展示</a></li>
<li><a href="#">快线</a></li>
</ul>
</body>
</html>
FDU_XN1回答
随时随地看视频慕课网APP
相关分类
JavaScript