if (isset($_POST['enter'])){
    $password = $_POST['pass'];
    $name = $_POST['name'];
    $query = "SELECT userName FROM users WHERE userName = '$name' and pass = '$password' LIMIT 1;";
    $result = mysql_query($query) or die (mysql_error());

    if($row = mysql_fetch_array($result)){
            $_SESSION['name'] = stripslashes(htmlspecialchars($_POST['name']));
            mysql_query("UPDATE users SET online='1' WHERE userName='$name' LIMIT 1;")
            or die(mysql_error());
            $loginName = $_SESSION['name'];
            mysql_query("INSERT INTO messages values('', '$loginName', '<i>has joined the chat session.</i>');");
        }
    else {
        echo 'WHY DOES THIS RUNS EVEN IF I HAVENT PUSHED ENTER IN MY FORM?';
    }
}