请问函数名为 ath 为什么函数里输入math也有输出呢
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">
function ath(x){
document.write(Math.ceil(x)+"<br />");
}
ath(3.3);
math(3.3);
</script>
</head>
<body>
</body>
</html>
