I wrote a form where its fields need to be reset after successful submission. The entire flow happens through ajax and php. Here is the code:
HTML 
<form role="form" class="contact-form" id="contact-fm" method="post">
                            <div class="form-group">
                                <div class="controls">
                                    <input type="text" placeholder="Name" class="requiredField" name="name" required>
                                </div>
                            </div>
                            <div class="form-group">
                                <div class="controls">
                                    <input type="email" class="email" class="requiredField" placeholder="Email" name="email" required>
                                </div>
                            </div>
                            <div class="form-group">
                                <div class="controls">
                                    <input type="text" class="requiredField" placeholder="Subject" name="subject" required>
                                </div>
                            </div>
                            <div class="form-group">
                                <div class="controls">
                                    <textarea rows="7" placeholder="Message" name="message" class="requiredField" required></textarea>
                                </div>
                            </div>
                            <button type="submit" id="submit" class="btn-system btn-large">Send</button>
                            <div id="success" style="color:#34495e;"></div>
                        </form>  
AJAX 
$(function() {
    $("input,textarea").jqBootstrapValidation({
        preventSubmit: true,
        submitError: function($form, event, errors) {
            // additional error messages or events
        },
        submitSuccess: function($form, event) {
            event.preventDefault(); // prevent default submit behaviour
            // get values from FORM
            var name = $("input#name").val();
            var email = $("input#email").val();
            var sub = $("input#subject").val();
            var message = $("textarea#message").val();
            $.ajax({
                url: "php/send.php",
                type: "POST",
                data: {
                    name: name,
                    email: email,
                    sub: subject,
                    message: message
                },
                cache: false,
            })
            document.getElementById('contact-fm').reset();
        },
    });
});  
PHP 
<?php 
    $name = $_POST['name'];
    $email = $_POST['email'];
    $message = $_POST['message'];
    $subject = $_POST['subject'];
    $to = 'ajay.k@enexl.com';
    if (filter_var($email, FILTER_VALIDATE_EMAIL)) { // this line checks that we have a valid email address
        $mailSubject = "Contact request from " .$name;
        $txt = "name : ".$name.".\n\nSubject : ".$subject.".\n\nMail id : ".$email."\n\nMessage : ".$message;
        $headers = "From: ".$email ;
        mail($to,$mailSubject,$txt,$headers);
        $data = array();
        $data['status'] = 'success';
        //echo json_encode($data);  
        echo "<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js'></script>";
        echo "<p id='text'>Your email was sent! One of our team members would contact you shortly!</p>"; // success message
        echo "<script type='text/javascript'>";
        echo "$(function(){";
        echo "$('#text').fadeOut(5000);";  
        echo "});";
        echo "</script>";
    }
    else{
        echo "<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js'></script>";
        echo "<p id='textOne'>Mail was not sent, make sure that all fields are filled in!</p>"; // success message
        echo "<script type='text/javascript'>";
        echo "$(function(){";
        echo "$('#textOne').fadeOut(5000);";  
        echo "});";
        echo "</script>";
    }
?>  
When I use document.getElementById('contact-fm').reset();, form doesn't get reset. How can I make it reset?
 
     
     
    