Help with E-mail Script

[splashlin]

<form method="post">
<input type="text" name="ea" id="ea" value="&lt;enter your email&gt;"size="20" style="width:180px; margin-left:0px" autocomplete="off">
<input type="submit" value="Join"/>
</form>

<?php

if(isset($_POST['hidSubmit']))

{
$to = "[e-mail]";
$Subject = "Request to Join Mailing List";
$message = $ea;
mail($to,$Subject,$message);

if(mail){
echo "<BR />Thanks, message sent";
}

else{
echo "<BR /> An Error occurred";
}

}
?>

When the user hits submit the standard e-mail field pops up. I want this e-mail to be hidden from the user and just automatically sent when the user hits join. If I remove the if statement the mail is sent hidden instantly when the page loads, so I feel the error must be in the if statement. Any help is greatly appreciated.

[wilku]

There is no input in your form called hidSubmit, thus checking for it in an if statement returns false.