<html><head><style>div { width: 400px; height: 400px; border: 1px solid black;}</style></head><body><h1>HTML Style 对象</h1><h2>backgroundImage 属性</h2><div id="myDiv">这是 myDiv。</div><br><button type="button" onclick="myFunction()">设置 myDiv 的背景图像</button><script>function myFunction() { document.getElementById("myDiv").style.backgroundImage = "url('/i/pic/tree.png')";}</script></body></html>