<html>
<head>
  <meta charset="utf-8">
  <title>xxx</title>
</head>
<body>
<form action="" method="post">
<!-- 不能修改且不能提交 -->
  <input type="text" name="haha" value="hehe" disabled="disabled">
<!-- 不能修改且能提交 -->
  <input type="text" name="hehe44" value="lala" readonly="readonly">
<!-- 能修改且能提交 -->
  <input type="text" name="haha2" value="hehe" >
  <input type="submit" value="tijiao">
</form>
</body>
</html>