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<!DOCTYPE html> <html> <body> <div tabindex="1">Begtut</div><br> <div tabindex="3">Google</div><br> <div tabindex="2">Microsoft</div> <script> // At start, set focus on the first div document.getElementsByTagName('div')[0].focus(); </script> <p tabindex="4"><b>注意：</b>尝试使用键盘上的"Tab"按钮在元素中导航。</p> </body> </html>