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<!DOCTYPE html> <html> <head> <style> body { height: 7500px; width: 5000px; } button { position: fixed; } </style> </head> <body> <p>单击其中一个按钮（多次）以滚动文档窗口。</p> <p>查看每个滚动条以查看效果。</p> <button onclick="scrollWin(0, 50)">向下滚动</button><br><br> <button onclick="scrollWin(0, -50)">向上滚动</button><br><br> <button onclick="scrollWin(100, 0)">向右滚动</button><br><br> <button onclick="scrollWin(-100, 0)">向左滚动</button><br><br> <script> function scrollWin(x, y) { window.scrollBy(x, y); } </script> </body> </html>