Mon code à un problème

Bonjour,
pouvez vous svp interpréter ce code, le passer dans un logiciel pour voir ce que ca donne et me dire ce qui ne va pas et à modifier, merci.

<title></title>
<SCRIPT language=Javascript>
 <!--
 function changeImageInfo(imageURL,title)
  {
  document.big_image.src = imageURL;
  document.image_form.image_title.value = title;
  }
 //-->
 </SCRIPT>
<table cellspacing="1" cellpadding="0" border="0" align="center">
    <tbody>
        <tr>
            <td align="middle" colspan="5">
            <form style="margin: 0px;" name="image_form">
                <input name="image_title" class="BOX4" style="border-width: 0px; font-weight: bold; font-size: 12px; width: 298px; background-color: transparent;" value="vue La Grave / St Pierre" />
            </form>
            </td>
        </tr>
        <tr>
            <td colspan="5"><img height="400" border="0" width="400" style="border: 1px solid rgb(0, 0, 0);" alt="" src="http://demain-la-terre.net/IMG/jpg/Essai_nucleaire_dans_le_Pacifique_photo_CEA_.jpg" name="big_image" /></td>
        </tr>
        <tr>
            <td align="right" width="60"><a onmouseover="changeImageInfo('http://absolute3d.net/fond-ecran-image/15224-1/Cool+_7_.jpg','Cuisine');return false;" onmouseout="changeImageInfo('http://demain-la-terre.net/IMG/jpg/Essai_nucleaire_dans_le_Pacifique_photo_CEA_.jpg','vue La Grave / St Pierre');return false;" href="javascript://"><img height="39" border="0" width="56" style="border: 1px solid rgb(0, 0, 0);" alt="Cuisine" src="http://absolute3d.net/fond-ecran-image/15224-1/Cool+_7_.jpg" /></a></td>
            <td width="60"><a onmouseover="changeImageInfo('colsa.jpg','Fenêtre balcon');return false;" onmouseout="changeImageInfo('http://demain-la-terre.net/IMG/jpg/Essai_nucleaire_dans_le_Pacifique_photo_CEA_.jpg','vue La Grave / St Pierre');return false;" href="javascript://"><img height="39" border="0" width="56" style="border: 1px solid rgb(0, 0, 0);" alt="Fenêtre balcon" src="colsa.jpg" /></a></td>
            <td width="60"><a onmouseover="changeImageInfo('Version:1.0 StartHTML:0000000105 EndHTML:0000002520 StartFragment:0000002368 EndFragment:0000002484

http://www.touslesprix.com/ph_tar/2/7/8/9/27897744.jpg
','Carrelage séjour');return false;" onmouseout="changeImageInfo('http://demain-la-terre.net/IMG/jpg/Essai_nucleaire_dans_le_Pacifique_photo_CEA_.jpg','vue La Grave / St Pierre');return false;" href="javascript://"><img height="39" border="0" width="56" style="border: 1px solid rgb(0, 0, 0);" alt="Carrelage séjour" src="Version:1.0 StartHTML:0000000105 EndHTML:0000002520 StartFragment:0000002368 EndFragment:0000002484,00000


http://www.touslesprix.com/ph_tar/2/7/8/9/27897744.jpg
" /></a></td>
            <td width="60"><a onmouseover="changeImageInfo('Version:1.0 StartHTML:0000000105 EndHTML:0000002559 StartFragment:0000002370 EndFragment:0000002523

http://csimg.leguide.com/...
','Vue sur Bazacle');return false;" onmouseout="changeImageInfo('http://demain-la-terre.net/IMG/jpg/Essai_nucleaire_dans_le_Pacifique_photo_CEA_.jpg','vue La Grave / St Pierre');return false;" href="javascript://"><img height="39" border="0" width="56" style="border: 1px solid rgb(0, 0, 0);" alt="Vue sur Bazacle" src="Version:1.0 StartHTML:0000000105 EndHTML:0000002559 StartFragment:0000002370 EndFragment:0000002523

http://csimg.leguide.com/...
" /></a></td>
            <td width="60"><a onmouseover="changeImageInfo('Version:1.0 StartHTML:0000000105 EndHTML:0000002589 StartFragment:0000002371 EndFragment:0000002553

http://s.plurielles.fr/...
','Vue sur place Intérieure Saint Cyprien');return false;" onmouseout="changeImageInfo('http://demain-la-terre.net/IMG/jpg/Essai_nucleaire_dans_le_Pacifique_photo_CEA_.jpg','vue La Grave / St Pierre');return false;" href="javascript://"><img height="39" border="0" width="56" style="border: 1px solid rgb(0, 0, 0);" alt="Vue sur place Intérieure Saint Cyprien" src="Version:1.0 StartHTML:0000000105 EndHTML:0000002589 StartFragment:0000002371 EndFragment:0000002553

http://s.plurielles.fr/...
" /></a></td>
        </tr>
    </tbody>
</table>

PS : quelle est la nature du code?