总感觉这个代码很麻烦，等我想想有没有改良版的
哈哈哈哈哈哈哈
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<style type="text/css">
#aa{
border: black 1px solid;
height: 200px;
width: 200px;
border-radius:50%;
float: left;
}
#bb{
border: black 1px solid;
height: 200px;
width: 200px;
border-radius:50%;
float: left;
}
#cc{
border: black 1px solid;
height: 200px;
width: 200px;
border-radius:50%;
float: left;
}
</style>
</head>
<body>
<div id="aa">
</div>
<div id="bb">
</div>
<div id="cc">
</div>
<button onclick="zz()">阿斯达</button>
</body>
<script type="text/javascript">
var a=document.getElementById("aa");
var b=document.getElementById("bb");
var c=document.getElementById("cc");
a.style.backgroundColor="black";
b.style.backgroundColor="black";
c.style.backgroundColor="black";
var d=["red","green","yellow","black"];
var i=0;
function ss(){
if(i==0)
{
a.style.backgroundColor=d[0];
b.style.backgroundColor="black";
c.style.backgroundColor="black";
}
else if(i==1)
{
a.style.backgroundColor="black";
b.style.backgroundColor=d[1];
c.style.backgroundColor="black";
}
else{
a.style.backgroundColor="black";
b.style.backgroundColor="black";
c.style.backgroundColor=d[2];
}
i++;
i=i%3;
}
function zz(){
setInterval("ss()",1000);
}
</script>
</html>