<type style = "text/css"> input {latar belakang: ekspresi ((this.readOnly && this.readonly == true)? "#cccccc": "")} <body> Ekspresi: ： ： ekspresi (操作手法) ； ekspresi(?:)
<!-
->
</tyle>
<input type = "text" name = "" />
<input type = "text" name = "" readonly = "readonly" />