.html代码如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>

<head>

<title>函数高级写法</title>
<script type="text/javascript">
  //function square(x){return x*x;}
  function setValue(x){return (x+10)};
  var f = function(x){return setValue(x)*setValue(x);};//<span style="color:#ff0000;">没有函数名的写法！！</span>
  
  //var f = function square(x){alert(square);return x*x;};
  alert(f(5));//注意写法
</script>
</head>
<body>

  

</body>
</html>


结果为225