I had some free time, so I fixed the errors. The first script is your corrected script; however, you'll notice that the png code won't work. I reworked the graph code for you in the second script. I'll leave it to you to integrate the two scripts. And, in the future, don't forget to use strictures:

#!/usr/bin/perl 
#
#
# This is the HTML form for selecting projects for QA Metrics
#
use lib qw(/tools/local/lib/perl5);
use strict;
use warnings;
use CGI qw(:standard);
use CGI::Carp qw(fatalsToBrowser);
use DBI;
use GD::Graph::linespoints;

my $cgi = new CGI;

my @timedata = localtime(time);

#print "Content-type: text/html\n\n";
#print "@timedata[0]\n, @timedata[1]\n, @timedata[2]\n,@timedata[3]\n,
+@timedata[4]\n,@timedata[5]\n,@timedata[6]";
my $day            = $timedata[3];
my $month          = $timedata[4] + 1;
my $year           = 1900 + $timedata[5];
my $def_start_date = '31/3/2009';
my $today_date     = join( '/', $day, $month, $year );
my $def_end_date   = $today_date;

#print "Content-type: text/html\n\n";
#print "$def_end_date";

if ( !$cgi->param ) {

    print $cgi->header;

    print $cgi->start_html(
        -title => 'Project Selection',
        -style => { 'src' => 'http://wwwin.telegent.com/sqametrics/sty
+le1.css' }
    );

    print $cgi->startform;
    print $cgi->h3('Select Project to view QA Metrics');
    print $cgi->br;
    print $cgi->br;
    print "<em><b>Enter Start Date  [dd/mm/yyyy]</b></em><br>";
    print $cgi->textfield(
        -name      => 'start_date',
        -default   => $def_start_date,
        -size      => 9,
        -maxlength => 80
    );
    print $cgi->br;
    print $cgi->br;
    print "<em><b>Enter End Date  [dd/mm/yyyy]</b></em><br>";
    print $cgi->textfield(
        -name      => 'end_date',
        -default   => $def_end_date,
        -override  => 'true',
        -size      => 9,
        -maxlength => 80
    );
    print $cgi->br;
    print $cgi->br;
    print $cgi->br;
    print "<b>Select Project and DataType to View QA Metrics </b><br>"
+;
    print $cgi->br;
    print $cgi->scrolling_list(
        -name  => 'Projects',
        -value => [
            'ARES',    'POSEIDON_SW', 'DEIMOS', 'MIMAS',
            'JUPITER', 'POSEIDON',    'DIONYSUS'
        ],
        -size     => 7,
        -multiple => 'false',
        -default  => 'ARES'
    );
    print $cgi->br;
    print $cgi->br;
    print $cgi->br;
    print "<b>Select Check Box for Plotting Verified, Closed Bug Data<
+/b><br>";
    print $cgi->br;
    print $cgi->checkbox(
        -name    => 'verified_closed',
        -checked => 0,
        -value   => 'verified-closed'
    );
    print $cgi->br;
    print $cgi->br;
    print "<b>Select from P1, P2, or P1+P2 Bugs Data</b><br>";
    print $cgi->br;
    print $cgi->radio_group(
        -name      => 'P1P2_bugs',
        -values    => [ 'P1', 'P2', 'P1-P2', 'Daily-Snapshot' ],
        -default   => ['P1'],
        -linebreak => 'true'
    );
    print $cgi->br;
    print $cgi->submit( -value => 'Submit Project' );
    print $cgi->endform;
    print $cgi->end_html;
}
else {
    my $start_date = param('start_date');
    my $end_date   = param('end_date');

    my $error_msg = "";

    $error_msg = &validate_date( $start_date, $end_date, $today_date )
+;

    #print "Content-type: text/html\n\n";
    #print $today_date;

#    my $error_msg = "";
#    if (!$start_date){
#    $error_msg1 = "The Start Date Field is Blank. Please use Browser 
+Back button and enter a Valid Start Date</BR>"};
#    if (!$end_date){
#    $error_msg2 = "The End Date Field is Blank. Please use Browser Ba
+ck button and enter a Valid End Date</BR>"};
#
    if ( !$error_msg ) {

        #my $start_date_newfrmt = &date_format($start_date);
        my @date_array = split( /\//, $start_date );
        my $start_date_newfrmt =
          join( '-', $date_array[2], $date_array[1], $date_array[0] );
        my @date_array1 = split( /\//, $end_date );
        my $end_date_newfrmt =
          join( '-', $date_array1[2], $date_array1[1], $date_array1[0]
+ );
        my @selected  = param('Projects');
        my $turned_on = param('verified_closed');

        #print "Content-type: text/html\n\n";
        #print $turned_on;

        my $which_radio_button = param('P1P2_bugs');

        #
        #Decide the rec_type based on the Radio button selection
        if ( $which_radio_button eq 'P1' ) {
            my $rec_type = '3';
            my $y_label  = 'Open P1 Bugs';
        }
        elsif ( $which_radio_button eq 'P2' ) {
            my $rec_type = '4';
            my $y_label  = 'Open P2 Bugs';
        }
        elsif ( $which_radio_button eq 'P1-P2' ) {
            my $rec_type = '2';
            my $y_label  = 'Open P1-P2 Bugs';
        }
        elsif ( $which_radio_button eq 'Daily-Snapshot' ) {
            my $rec_type = '1';
            my $y_label  = 'Daily-Snapshot';
        }
        my $project_name1 = $selected[0];
        my $num_selected  = @selected;

#
# Check what data types are selcted and set flags for plotting the dat
+a
#
#print "Content-type: text/html\n\n";
#print @selected[0],@turned_on[0], $new_flag, $open_flag, $reopen_flag
+, $closed_flag;

        my $rec_type;
        my $dbh = DBI->connect( 'dbi:mysql:bugz:bugzilla.telegent.com:
+3306',
            'swqa', 'sImANten' )
          or die "Connection Error: $DBI::errstr\n";
        my $sql =
"Select log_date, new_cnt, open_cnt, reopen_cnt, fixed_cnt, verified_c
+nt, closed_cnt from swqa.Poseidon where product like '%$project_name1
+%' and 'rec_type'=$rec_type and log_date between '$start_date_newfrmt
+' and '$end_date_newfrmt'";
        my $sth = $dbh->prepare($sql);
        $sth->execute or die "SQL Error: $DBI::errstr\n";
        my @log_date      = ();
        my @new_bugs      = ();
        my @open_bugs     = ();
        my @reopen_bugs   = ();
        my @fixed_bugs    = ();
        my @verified_bugs = ();
        my @closed_bugs   = ();

        while ( my @row = $sth->fetchrow_array ) {

#       print "<tr><td>$row[0]</tr></td><tr><td>$row[1]</td></tr><tr><
+td>$row[2]</tr></td>\n";
            push @log_date,      $row[0];
            push @new_bugs,      $row[1];
            push @open_bugs,     $row[2];
            push @reopen_bugs,   $row[3];
            push @fixed_bugs,    $row[4];
            push @verified_bugs, $row[5];
            push @closed_bugs,   $row[6];
        }

        #        print @log_date;
        #        print @deimos_open_bugs;

        $dbh->disconnect;

        #print "Content-type: text/html\n\n";
        #print $new_flag, $open_flag, $reopen_flag, $fixed_flag;
        #
        if ( $turned_on eq 'verified-closed' ) {
            my @data = (
                \@log_date,    \@new_bugs,   \@open_bugs,
                \@reopen_bugs, \@fixed_bugs, \@verified_bugs,
                \@closed_bugs
            );
        }
        else {
            my @data = (
                \@log_date,    \@new_bugs, \@open_bugs,
                \@reopen_bugs, \@fixed_bugs
            );
        }

        print $cgi->header( -type => 'image/png' );

        my $title = "Open Bugs for $project_name1";
        my $mygraph = GD::Graph::linespoints->new( 600, 400 );

#my @legend_keys = qw(new_bugs open_bugs reopen_bugs fixed_bugs verifi
+ed_bugs );
        my @legend_keys =
          qw(new_bugs open_bugs reopen_bugs fixed_bugs verified_bugs c
+losed_bugs);
        $mygraph->set(
            x_label              => 'Log_Date',
            y_label              => '$y_label',
            x_label_skip         => 30,
            x_labels_vertical    => 'true',
            title                => $title,
            legend_placement     => 'BL',
            legend_marker_height => 12,
            dclrs                => [qw(green blue red yellow brown or
+ange)],
        ) or warn $mygraph->error;
        $mygraph->set_legend(@legend_keys);
        $mygraph->set_title_font(GD::gdGiantFont);
        $mygraph->set_x_label_font(GD::gdLargeFont);
        $mygraph->set_y_label_font(GD::gdLargeFont);
        my @data;
        my $myimage = $mygraph->plot( \@data ) or die $mygraph->error;

        binmode STDOUT;
        print $myimage->png;

        #my $mygraph
        #print $cgi->end_html;
    }
    else {
        print "Content-type: text/html\n\n";
        print $cgi->h3('Error Message');
        print $cgi->h3($error_msg);
    }
}

sub date_format {
    my $date;
    my @date_array = split( /\//, $date );
    print @date_array;

    my $new_date = join( '-', $date_array[2], $date_array[1], $date_ar
+ray[0] );
    return $new_date;
}

sub validate_date {

    my $start_date          = $_[0];
    my $end_date            = $_[1];
    my $today_date          = $_[2];
    my @start_date_array    = split( /\//, $start_date );
    my @end_date_array      = split( /\//, $end_date );
    my @today_date_array    = split( /\//, $today_date );
    my $yyyymmdd_start_date = join( "",
        $start_date_array[2], $start_date_array[1], $start_date_array[
+0] );

    #    print "Content-type: text/html\n\n";
    #    print $yyyymmdd_start_date;
    my $error_msg = "";
    if ( !$start_date || !$end_date ) {
        $error_msg =
"Blank Field in Date field. Please Use Browser Back button and Enter D
+ate Field";
    }
    elsif (( $start_date !~ m[^\d+\/\d+\/\d{4}$] )
        || ( $end_date !~ m[^\d+\/\d+\/\d{4}$] ) )
    {
        $error_msg =
"Invalid Characters in Date. Please Use Browser Back button and Enter 
+Start Date";
    }
    else {
        my $error_msg = "";
    }
    return $error_msg;

}
[download]

The code for your .png:

#!/usr/bin/perl

use strict;
use warnings;
use GD::Graph::linespoints;

my $title = "Open Bugs for Buggy";
my $graph = GD::Graph::linespoints->new( 600, 400 );
my @legend_keys =
  qw(new_bugs open_bugs reopen_bugs fixed_bugs verified_bugs closed_bu
+gs);
$graph->set(
    x_label              => 'Log_Date',
    y_label              => '$y_label',
    x_label_skip         => 30,
    x_labels_vertical    => 'true',
    title                => $title,
    legend_placement     => 'BL',
    legend_marker_height => 12,
);
$graph->set( dclrs => [qw(green blue red yellow brown orange)] );
$graph->set_legend(@legend_keys);
$graph->set_title_font(GD::gdGiantFont);
$graph->set_x_label_font(GD::gdLargeFont);
$graph->set_y_label_font(GD::gdLargeFont);

my @data = (
    [qw( Jan Feb Mar Apr May Jun Jul Sep )],
    [ reverse( 4, 3, 5, 6, 3, 1.5, -1, -3, -4 ) ],
);
print $graph->plot( \@data );
save_chart( $graph, 'Buggy' );

sub save_chart {
    my $chart = shift or die "Need a chart!";
    my $name  = shift or die "Need a name!";
    local (*OUT);
    my $ext = $chart->export_format;
    open( OUT, ">Buggy.png" ) or die "Cannot open Buggy.png for write:
+ $!";
    binmode OUT;
    print OUT $chart->gd->$ext();
    close OUT;
}
[download]