jQuery Form Submit event

Introduction

If try to submit any invalid value. It will produce an error.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Executing a Function on Form Submit Event in jQuery</title>
<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<style>
    .error{/*from  w  ww  .j  a v a  2 s . c  o  m*/
        color: red;
    }
</style>
<script>
$(document).ready(function(){
    $("form").submit(function(event){
        var regex = /^[a-zA-Z]+$/;
        var currentValue = $("#firstName").val();
        if(regex.test(currentValue) == false){
            $("#result").html('<p class="error">Not valid!</p>').show().fadeOut(1000);
            // Preventing form submission
            event.preventDefault();
        }
    });
});
</script>
</head>
<body>
    <form action="action.php" method="post" id="users">
        <label for="firstName">First Name:</label>
        <input type="text" name="first-name" id="firstName">
        <input type="submit" value="Submit">
        <div id="result"></div>
    </form>
</body>
</html>

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