console 命令行工具 X clear

console

var str="abcde";
var arr=str.split("");
arr=arr.reverse();//颠倒顺序
document.write("字符串颠倒后的顺序为: "+arr.join(""));

<!DOCTYPE html> 
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <script>
    </script>
</head>
<body>
</body>
</html>