<?php
$IP = $_SERVER[REMOTE_ADDR];
?>

<form name=reg action=do_reg.php method=post>
<table border=0 cellspacing=0 cellpadding=2>
<tr><td>
Username:<td><input type=text name=username>
<tr><td>
Password:<td><input type=password name=password>
<tr><td>
Confirm:<td><input type=password name=pass_conf>
<tr><td>
Email:<td><input type=text name=email>
<tr><td colspan=2>
<input type=hidden name=ip value'<?php echo $IP ?>'>
<input type=submit value='Register'>
</form>
</table>