<html>
<head>
<style>
input:read-write
{
background-color: yellow;
}
</style>
</head>
<body>
<h3> :read-write 选择器实例演示。</h3>
<p>普通的input元素:<br><input value="hello"></p>
<p>只读的input元素:<br><input readonly value="hello"></p>
<p> :read-write 选择器选取没有设置 "readonly" 属性的元素。</p>
</body>
</html>