In the bindings instead of:
<?php echo((isset($_POST["Website"]))?$_POST["Website"]:""); ?>
try:
<?php echo(!empty($_POST["Website"])? ((strpos(strtolower($_POST["Website"]), "http") !== 0)?"http://".$_POST["Website"]:$_POST["Website"]):""); ?>
Another simple solution is to use <input type="url"> and then most browsers will automatically require them to add the http:// or https:// before the form submits.