js 禁止表单form提交的方法

<code>
<title>js 禁用表单form提交的方法</title>

<script type="text/javascript" src="/Public/js/jquery-1.7.1.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
  $("form").submit(function(e){
    e.preventDefault();
    alert("form已经禁止提交");
  });
});
</script>


<form name="input" action="123.php" method="post">
email: 
<input type="text" name="email" value="1233@q.com" size="20">
<br>address: 
<input type="text" name="address" value="dsf" size="20">
<br>
<input type="submit" value="Submit">
</form> 

</code>