W3School TIY
脚 本 学 堂 www.jbxue.com
编辑您的代码：
<html> <body> Field1: <input type="text" id="field1" value="Hello World!"> <br /> Field2: <input type="text" id="field2"> <br /><br /> Click the button below to copy the content of Field1 to Field2. <br /> <button onclick="document.getElementById('field2').value= document.getElementById('field1').value">Copy Text</button> </body> </html>
查看结果: