<html>
<head>
<script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("form").submit(function(event){
event.preventDefault();
alert("Submit prevented");
});
});
</script>
</head>
<body>
<form action="">
First name:
<input type="text" name="FirstName" value="Mickey"><br>
Last name:
<input type="text" name="LastName" value="Mouse"><br>
<input type="submit" value="Submit">
</form>
</body>
</html>