復制代碼 代碼如下:
<html>
<head>
<title> New Document </title>
<meta content="EditPlus">
<meta content="">
<meta content="">
<meta content="">
</head>
<script language="JavaScript">
function isreadonly(){
var obj = document.getElementById("username");
obj.setAttribute("readOnly",true);
obj.style.backgroundColor="#d2d2d2";
}
function readwrite(){
var obj = document.getElementById("username");
obj.setAttribute("readOnly",false);
obj.style.backgroundColor="#ffffff";
}
</script>
<body>
<form method="post" action="" >
<input type="text">
<input type="button" value="read">
<input type="button" value="write">
</form>
</body>
</html>
<!--
點擊“read”按鈕，input框不能書寫，且變灰；點擊“write”按鈕，input框恢復。
-->
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