Script verbeteren

<script type="text/javascript" src="/ckeditor/ckeditor.js"></script>
    <script type="text/javascript">
    //<![CDATA[

    var editor;

    function changeEnter()
    {
       // If we already have an editor, lets destroy it first.
       if ( editor )
          editor.destroy( true );

       // Create the editor again, with the appropriate settings.
       editor = CKEDITOR.replace( editor1,
          {
             enterMode        : Number( 2 ),
             shiftEnterMode    : Number( 2 )
        });
    }

    window.onload = changeEnter;

    //]]>
    </script>
[COLOR= #0000BB]<?php  
$a[/COLOR][COLOR= #007700]=[/COLOR][COLOR= #0000BB]$_GET[/COLOR][COLOR= #007700][[/COLOR][COLOR= #DD0000]a[/COLOR][COLOR= #007700]];[/COLOR]
[URL="http://www.php.net/if"]if[/URL][COLOR= #007700]([/COLOR][COLOR= #0000BB]$a[/COLOR][COLOR= #007700]==[/COLOR][COLOR= #DD0000]s[/COLOR][COLOR= #007700]){[/COLOR]
[COLOR= #0000BB]$naam[/COLOR][COLOR= #007700]=[/COLOR][COLOR= #0000BB]$_POST[/COLOR][COLOR= #007700][[/COLOR][COLOR= #DD0000]naam[/COLOR][COLOR= #007700]];[/COLOR]
[COLOR= #0000BB]$bericht[/COLOR][COLOR= #007700]=[/COLOR][COLOR= #0000BB]$_POST[/COLOR][COLOR= #007700][[/COLOR][COLOR= #DD0000]bericht[/COLOR][COLOR= #007700]];[/COLOR]
[COLOR= #0000BB]$bestand[/COLOR] [COLOR= #007700]=[/COLOR] [URL="http://www.php.net/fopen"]fopen[/URL][COLOR= #007700]([/COLOR][COLOR= #DD0000]"$naam.php"[/COLOR][COLOR= #007700],[/COLOR] [COLOR= #DD0000]"a"[/COLOR][COLOR= #007700]);[/COLOR]
[URL="http://www.php.net/fwrite"]fwrite[/URL][COLOR= #007700]([/COLOR][COLOR= #0000BB]$bestand[/COLOR][COLOR= #007700],[/COLOR] [COLOR= #DD0000]"$bericht"[/COLOR][COLOR= #007700]);[/COLOR]
[URL="http://www.php.net/fclose"]fclose[/URL][COLOR= #007700]([/COLOR][COLOR= #0000BB]$bestand[/COLOR][COLOR= #007700]);[/COLOR] 
[URL="http://www.php.net/echo"]echo[/URL][COLOR= #DD0000]"Bedankt!<br><br><a href=gastenboek.php>Gastenboek</a>"[/COLOR][COLOR= #007700]; 
}[/COLOR] [URL="http://www.php.net/else"]else[/URL] [COLOR= #007700]{[/COLOR] 
[URL="http://www.php.net/echo"]echo[/URL][COLOR= #DD0000]"<form method=post action=?p=12&a=s>"[/COLOR][COLOR= #007700];[/COLOR] 
[URL="http://www.php.net/echo"]echo[/URL][COLOR= #DD0000]"Naam:<br><input type=text name=naam><br>"[/COLOR][COLOR= #007700];[/COLOR] 
?>
Bericht:<br><textarea id="editor1" name="bericht" style="margin-right: 5px;"></textarea>
<br>
[COLOR= #0000BB]<?[/COLOR]
[URL="http://www.php.net/echo"]echo[/URL][COLOR= #DD0000]"<input type=submit value=Verstuur>"[/COLOR][COLOR= #007700];[/COLOR] 
[URL="http://www.php.net/echo"]echo[/URL][COLOR= #DD0000]"</form>"[/COLOR][COLOR= #007700]; 
}[/COLOR] 
?>