TPL contact form

Question

I have a website that uses tpl_load for themes, and i cant figure out a way to make a contact form for it.

My php pages use this for the theme files

For example on my contactus.php file it would use this code for the theme.

<?
$content = tpl_load("contactus.html", 1, 0);
?>

Does anyone know of a code of script for a simple contact form for tpl_load with a name email and subject and content section?

Thanks