Oops typo, was missing td after else.

# My requirement is to set a different background color 
# to rows depending on the "IF" conditions they satisfy.
# Please help,what is the correct syntax

while (my $line = <$IN>) {
  if ($line =~ /.*MATCH.*/) {
    $ret .= "<tr><td style='background-color:orange'>$line </td></tr>\
+n";
  }
  else {
    $ret .= "<tr><td>$line </td></tr>\n";
  }
}
close  $IN;
return $ret;
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