check your status bar for the URL you would get by clicking..
email..
<a href="',$_SERVER['SCRIPT_NAME'],'?mail=corz&subject=corz.org">email </a>
or you could run the function in a seperate file, and just link to it..
<a href="/someplace/mail.php?mail=corz&subject=corz.org">email </a>
or whatever..
<a href="?mail=corz">email </a> (the subject is optional)