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<!DOCTYPE html> <html> <style> #myDIV { border: 1px solid black; width: 300px; height: 150px; background: url('/i/pic/flower.gif') no-repeat; } </style> <body> <h1>HTML Style 对象</h1> <h2>backgroundRepeat 属性</h2> <p>请点击“试一试”按钮，将 DIV 元素的 background-repeat 属性设置为 “repeat-x”：</p> <button onclick="myFunction()">试一试</button> <div id="myDIV"> <h1>Hello</h1> </div> <script> function myFunction() { document.getElementById("myDIV").style.backgroundRepeat = "repeat-x"; } </script> </body> </html>