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<!DOCTYPE html> <html> <style> body { background: #f3f3f3 url('/i/pic/flower.gif'); } </style> <body> <h1>HTML Style 对象</h1> <h2>backgroundRepeat 属性</h2> <button type="button" onclick="myFunction()">把背景图像设置为 no-repeat</button> <script> function myFunction() { document.body.style.backgroundRepeat = "no-repeat"; } </script> </body> </html>