<a href="contact.php?title=Jimmy&emailto=jimmy@mysite.com">

<?php
// Checks to see if $emailto is empty, if so, it will send to this default email address
if (empty($_GET['emailto'])) {
    $_GET['emailto'] = 'info@mysite.com';
}
?>

<?php
// Checks to see if $title is empty, if so, will default the the selected title "US"
if (empty($_GET['title'])) {
    $_GET['title'] = 'Us';
}
?>