# Start the page and form creation process as required
$co = HTML::Tiny->new( mode => 'html' );


if ($co->param())
{

    #data returned from the form submission
    print "data present - to be analysed\n";
    $buffer = "";
    if($ENV{'REQUEST_METHOD'} eq "POST")
    {
        # POST method retrieves data by the READ command
        print "POST read\n";
        read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});
    }
    else
    {
        # GET method retrieves by accessing the relevant environment variable
        print "Query String\n";
        $buffer = $ENV{'QUERY_STRING'};
    }

    print ("buffer=<p>$buffer</p>");


    if (length ($buffer) > 0)
    {
       # Analyse the form data ....
    }
    else
    {
        print "<p>buffer size is zero<p>";
        exit;
    }
}
else
{
    # No data passed to here by a submit - create the display form that is required to do so
    print "no data present -to display form\n";
    displayForm();

}