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Tryit: JAVASCRIPT
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<!DOCTYPE html> <html> <body> <a id="myAnchor">链接：前往begtut.com</a> <p>点击按钮设置上面a元素的href属性值为“www.begtut.com”。</p> <button onclick="myFunction()">试一试</button> <p><strong>注意：</strong>Internet Explorer 8 及更早版本不支持 setAttribute 方法。</p> <script> function myFunction() { document.getElementById("myAnchor").setAttribute("href", "https://www.begtut.com"); } </script> </body> </html>