复制代码代码如下:
<html>
<head>
<Title> Novo documento </title>
<meta name = "generator" content = "editplus">
<meta name = "autor" content = "">
<meta name = "Keywords" content = "">
<meta name = "description" content = "">
</head>
<Script Language = "JavaScript">
function isreadonly () {
var obj = document.getElementById ("nome de usuário");
obj.setAtattribute ("readonly", verdadeiro);
obj.style.backgroundColor = "#d2d2d2";
}
função readWrite () {
var obj = document.getElementById ("nome de usuário");
obj.setAtattribute ("readonly", false);
obj.style.backgroundColor = "#ffffff";
}
</script>
<Body>
<formul
<input type = "text" id = "nome de usuário" nome = "nome de usuário">
<input type = "button" name = "只读" value = "read" onclick = "isReRenly ();">
<input type = "button" name = "可写" value = "write" onclick = "readWrite ();">
</morm>
</body>
</html>
<!-
点击 “Read” 按钮 ， entrada 框不能书写 ， 且变灰；点击 “write” 按钮 ， entrada 框恢复。
->