<DIV class=fly id=fly1><A href="javascript:gaestebuch()"
onmouseout=hideObject(desc1)
onmouseover=showObject(desc1) target=_self>Gästebuch</A><BR></DIV>

ersetz das mal durch...

<DIV class=fly id=fly1>
<A href="gaestebuch.php" onmouseout=hideObject(desc1)
onmouseover=showObject(desc1) target=_self>Gästebuch</A><BR></DIV>

ist es das was du meinst?

mfg
fks