required fields in PHP

[fataah]

Hi, I am trying to create required fields in my form that i am trying to email me the information filled in form. But my coding for required fields is not working right pleas help.

Here is my code:

<?php $errmsg = "";
if (!isset($POST['name']) || empty($POST['name'])) $errmsg .= "<p>Please enter your first name";
if (!isset($POST['email']) || empty($POST['email'])) $errmsg .= "<p>Please enter your email address";
if (!isset($POST['invite']) || empty($POST['invite'])) $errmsg .= "<p>Please enter the invitation code";
if ($errmsg == "") {

echo $errmsg;

echo "<a href=\"javascript:history.back();\">Please go back and fill out the missing fields</a>";

exit;
} else {

$to = "[e-mail]";

$subject = "Registration Form";
$message = "registration information\n\n";
$message .= "Organization Name: " . $POST['orgName'] . "\n";

$message .= "Name: " . $POST['name'] . "\n";
$message .= "Invitation: " . $POST['invite'] . "\n";
$message .= "Address: " . $POST['address'] . "\n";
$message .= "City: " . $POST['city'] . "\n";
$message .= "State: " . $POST['state'] . "\n";
$message .= "Zipcode: " . $POST['zipcode'] . "\n";
$message .= "Country: " . $POST['country'] . "\n";
$message .= "Telephone: " . $POST['telephone'] . "\n";

$message .= "Email: " . $POST['email'] . "\n";

$message .= "Fax: " . $POST['fax'] . "\n";

$message .= "Alternate Contact: " . $POST['altContact'] . "\n\n";
$message .= "Alternate Email: " . $_POST['altEmail'] . "\n\n";

if (mail($to,$subject,$message)) {

echo "<p>thank you for registering!";

} else {

echo "<p>email could not be sent"; } }
?>

[leatherback]

please use {php] [/ php] bb tags around php code.

Next time: Describe what is not working.

In this case this: if ($errmsg == "") {

was meant to be:
if ($errmsg <> "") {