if you open that file and go to line 45 you will see something like this:
<input type="hidden" name="task" value="" />
</form>
<?php } ?>
function showText( $option, &$rows ) {
?>
Change the red line to
<?php }
You will then get another error on line 78 just add the \ to the inner "
so it reads
echo "<img src=\"images/tick.png\" border=\"0\" />";