<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("form").submit(function(e){
e.preventDefault();
alert("Submit prevented");
});
});
</script>
</head>
<body>
<form name="input" action="" method="get">
First name:
<input type="text" name="FirstName" value="Mickey" size="20">
<br />Last name:
<input type="text" name="LastName" value="Mouse" size="20">
<br />
<input type="submit" value="Submit">
</form>
</body>
</html>
function(e)
e.preventDefault();阻止当前事件
原文：http://www.cnblogs.com/yy-TANG/p/7457716.html