foreach $host (keys %hosts){
                print "<tr><td>$host</td>";
                if ( $hosts{$host} ) {
                        print "<td align=center><img src=/nagios/images/greendot2.gif border=0></td></tr>";
                } else {print "<td align=center><img src=/nagios/images/reddot.gif border=0></td></tr>"; }
        }