<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>表單提交後按鈕禁用</title>
<script type="text/javascript">
function sub() {
document.forms[0].elements[0].disabled = true;
document.forms[0].submit();
}
</script>
</head>
<body>
<form action="login.action" method="post">
<input type="button" name="btn" value="提交表單" onclick="return sub();" />
</form>
</body>
</html>
表單提交後，提交按鈕不可用