<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <script type="text/javascript"> //输入字符串，然后逆序输出出来. var a=prompt("请输入字符串·"); var b=a.split(''); var arr=[]; for(var i=b.length-1;i>=0;i--) { arr+=b[i]; } console.log(arr); </script> </body> </html>
