百变圆圈，变变变！
<html>
<head>
<title>百变圆圈</title>
</head>
<body>
<script>
funtion rad(a){
a.style.broderRaduis="50";
};
</script>
</body>
<div>
<input onclick="rad()"></input>
</div></html>
<html>
<head>
<title>百变圆圈</title>
</head>
<body>
<script>
funtion rad(a){
a.style.broderRaduis="50";
};
</script>
</body>
<div>
<input onclick="rad()"></input>
</div></html>