Grazie xinod ma non riesco ad usare il tuo codice... in effetti non sono in grado di inerirlo a dovere nella pagina posto più codice per farmi capire meglio.....ciao!

il javascript.....
Codice PHP:
function showhide(id){
     if (document.getElementById(id).style.display == "none"){
            document.getElementById(id).style.display = "";
         document.images['flag_'+id].style.display = "inline";
         document.images['flag_'+id+'_2'].style.display = "none";
     } else {
         document.getElementById(id).style.display = "none";
         document.images['flag_'+id].style.display = "none";
         document.images['flag_'+id+'_2'].style.display = "inline";
     }
 } 
l'html......
Codice PHP:
<td align="left">
         [url="#"][img]common/flags/flag_it.jpg[/img][img]common/flags/flag_it_2.jpg[/img][/url]
          [url="#"][img]common/flags/flag_en.jpg[/img]come sopra[/url]
          [url="#"][img]common/flags/flag_fr.jpg[/img]come sopra[/url]
          [url="#"][img]common/flags/flag_de.jpg[/img]come sopra[/url]
          [url="#"][img]common/flags/flag_es.jpg[/img]come sopra[/url]
          [url="#"][img]common/flags/flag_jp.jpg[/img]come sopra[/url]
      </td>
     </tr>
   <tr id="it">
     <td align="right" valign="top">[b]IT: [/b]</td>
     <td align="left"><textarea name="desc_it" cols="200" rows="20" class="textarea">/textarea></td>
     </tr>
   <tr id="en" style="display:none">
     <td align="right" valign="top">[b]EN: [/b]</td>
      <td align="left"><textarea name="desc_en" cols="200" rows="20" class="textarea"></textarea></td>
     </tr>
   <tr id="fr" style="display:none">
     <td align="right" valign="top">[b]FR: [/b]</td>
     <td align="left"><textarea name="desc_fr" cols="200" rows="20" class="textarea"></textarea></td>
     </tr>
   <tr id="de" style="display:none">
      <td align="right" valign="top">[b]DE: [/b]</td>
     <td align="left"><textarea name="desc_de" cols="200" rows="20" class="textarea"></textarea></td>
     </tr>
   <tr id="es" style="display:none">
     <td align="right" valign="top">[b]ES: [/b]</td>
     <td align="left"><textarea name="desc_es" cols="200" rows="20" class="textarea"></textarea></td>
     </tr>
    <tr id="jp" style="display:none">
     <td align="right" valign="top">[b]JP: [/b]</td>
     <td align="left"><textarea name="desc_jp" cols="200" rows="20" class="textarea"></textarea></td>
     </tr>
   <tr>