<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<form action="" method="post"> <!--update the form action field -->
<label for="logo">
<img src="https://upload.wikimedia.org/wikipedia/commons/3/33/Vanamo_Logo.png" width="230px" height="250px;" class="logo-margin" alt="logo" style="cursor:pointer;">
</label>
<input type="file" id="logo" onchange="this.form.submit()" style="display:none;">
</form>
