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Tryit: JAVASCRIPT
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<!DOCTYPE html> <html> <body> <iframe id="myframe" src="/default.asp"></iframe> <p>单击按钮以更改 iframe 中的 src 属性。</p> <button onclick="myFunction()">试一试</button> <script> function myFunction() { document.getElementById("myframe").src = "http://www.cnn.com"; } </script> </body> </html>