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<!DOCTYPE html> <html> <head> <style> body { width: 5000px; } button { position: fixed; } </style> </head> <body> <p>单击该按钮可将文档窗口水平滚动 100 像素。</p> <p>查看水平滚动条以查看效果。</p> <button onclick="scrollWin()">点我横向滚动！</button><br><br> <script> function scrollWin() { window.scrollBy(100, 0); } </script> </body> </html>