复制代码代码如下:
<html>
<голова>
<название> новый документ </title>
<meta name = "Generator" Content = "EditPlus">
<meta name = "Author" content = "">
<meta name = "Keywords" content = "">
<meta name = "description" content = "">
</head>
<script language = "javascript">
функция isReadOnly () {
var obj = document.getElementbyId ("имя пользователя");
obj.setattribute ("readonly", true);
obj.style.backgroundcolor = "#d2d2d2";
}
функция readwrite () {
var obj = document.getElementbyId ("имя пользователя");
obj.setattribute ("readonly", false);
obj.style.backgroundcolor = "#ffffff";
}
</script>
<тело>
<form name = "addform" id = "addform" method = "post" action = "">
<input type = "text" id = "username" name = "username">
<input type = "button" name = "只读" value = "read" onclick = "isreadonly ();">
<input type = "кнопка" name = "可写" value = "write" onclick = "readwrite ();">
</form>
</body>
</html>
<!-
点击 «Читать» 按钮 ， ввод 框不能书写 ， 且变灰；点击 «написать» 按钮 ， ввод 框恢复。
->