[PHP] strange problem (user poll)

[- \[ Paul Ferrie \] -]

Can anyone see a problem in this?  When i run the script i am getting this
error "Notice: Undefined variable: action in
C:\www\Apache2\htdocs\user_poll\2\addpoll.php on line 13"

<?
// addpoll.php
// Case Study 1: User Poll - Foundation PHP for Flash

// If the form has been submitted...
(line 13) if ($action == "add") {
    // Include config file
    include('common.php');

    // Connect to database
    $link = dbConnect();

    // Get date for new poll
    $posted = time();

    // Build query to insert new poll
    $query = "INSERT INTO polls (question, option1, option2, option3,
posted)
              VALUES('$question', '$option1', '$option2', '$option3',
$posted)";

    // Execute query
    $result = @mysql_query($query);

    // If query failed...
    if (!$result) {
        // Display error
        print "<font color=\"#ff0000\">Could not insert poll</font><br>\n";
    } else {
        print "<font color=\"#0000ff\">Poll added</font><br>\n";
    }

    mysql_close($link);
}
?>
please anyone



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