<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <script type="text/javascript"> function copyUrl2() { var Url2=document.getElementById("biao1"); Url2.select(); // 选择对象 document.execCommand("Copy"); // 执行浏览器复制命令 alert("已复制好，可贴粘。"); } </script> <textarea cols="20" rows="10" id="biao1">用户定义的代码区域</textarea> <input type="button" onClick="copyUrl2()" value="点击复制代码" /> </body> </html>