​x
 
<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>
​