复制代码代码如下::
<html>
<kopf>
<title> Neues Dokument </title>
<meta name = "generator" content = "editPlus">
<meta name = "Autor" content = "">
<meta name = "keywords" content = "">
<meta name = "Beschreibung" content = "">
</head>
<script Language = "JavaScript">
Funktion isReadonly () {
var obj = document.getElementById ("Benutzername");
obj.setattribute ("readonly", wahr);
obj.style.backgroundcolor = "#d2d2d2";
}
Funktion ReadWrite () {
var obj = document.getElementById ("Benutzername");
obj.setattribute ("readonly", falsch);
obj.style.backgroundcolor = "#ffffff";
}
</script>
<body>
<Formular name = "addForm" id = "addForm" methode = "post" action = "">
<Eingabe type = "text" id = "userername" name = "userername">
<input type = "button" name = "只读" value = "read" onclick = "isReadOnly ();">
<input type = "button" name = "可写" value = "write" onclick = "ReadWrite ();">
</form>
</body>
</html>
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点击 „lesen“ 按钮 ， Eingabe 框不能书写 ， 且变灰；点击 „schreiben“ 按钮 ， Eingabe 框恢复。
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