[https://www.jb51.net/article/135605.htm js复制问题](https://www.jb51.net/article/135605.htm)
```
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<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" />
<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>
</body>
</html>
```
