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<!DOCTYPE html> <html> <style> #myDIV { width: 300px; height: 300px; background: lightblue url('/i/pic/flower.gif') no-repeat; color: white; overflow: auto; } </style> <body> <h1>HTML Style 对象</h1> <h2>backgroundAttachment 属性</h2> <p>请点击单选按钮并滚动 DIV 元素以查看 background-attachment 属性的效果：</p> <form name="myForm"> <input type="radio" name="myAtt" value="scroll" onclick="myFunction()" checked>scroll <input type="radio" name="myAtt" value="local" onclick="myFunction()">local </form> <div id="myDIV"> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> <h1>Hello</h1> </div> <script> function myFunction() { if (document.forms["myForm"]["myAtt"][0].checked) { document.getElementById("myDIV").style.backgroundAttachment = "scroll"; } else { document.getElementById("myDIV").style.backgroundAttachment = "local"; } } </script> </body> </html>