Ya lo he organizado un poco, y lo he probado y no se me abren los bloques, lo he puesto así, a ver si he cometido algun error:
Código HTML:
<div id="capas">
<a href="#" onclick="mostrar(this,'oculto1'); return false" />22 de Marzo del 2010</a><br>
<div id="oculto1" style="display:none">
<center>
Fotos ensayo
<br>
<!-- ________ START EFFECTS CODE - http://www.effectscode.com/ ________ -->
<script src="effectscode.com.js" type="text/javascript"></script>
<div class="com.effectscode.PhotoShoot" style="width:300px; height:225px;">
<textarea class="effectscode" style="visibility:hidden;" rows="1" cols="20">
// <!-- ____________________________ Start XML ___________________________
<PhotoShoot bgcolor="#001B8D" showTime="3000">
<ZoomImage src="fotosensayos/21-3-10/1.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/21-3-10/2.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/21-3-10/3.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/21-3-10/4.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/21-3-10/5.JPG" zoomToX="243" zoomToY="101" />
</PhotoShoot>
// _____________________________ End XML ____________________________ -->
</textarea><div class="alternateContent">
<a href="http://www.effectscode.com/Slideshows/PhotoShoot">Photo Shoot flash
effect script</a> requires <a href="http://www.adobe.com/go/getflash/">Flash 9</a>
</div></div>
<script type="text/javascript">ECreplace();</script>
<!-- _______________________ END EFFECTS CODE _________________________ --> </div>
</div>
</div>
<br />
<a href="#" onclick="mostrar(this,'oculto2'); return false" />17 de Abril del 2010</a><br>
<div id="oculto2" style="display:none">
<br><center><span style="color: #FFFFFF" size="10">
Fotos ensayo
<br>
<!-- ________ START EFFECTS CODE - http://www.effectscode.com/ ________ -->
<script src="effectscode.com.js" type="text/javascript"></script>
<div class="com.effectscode.PhotoShoot" style="width:300px; height:200px;">
<textarea class="effectscode" style="visibility:hidden;" rows="1" cols="20">
// <!-- ____________________________ Start XML ___________________________
<PhotoShoot bgcolor="#001B8D" showTime="3000">
<ZoomImage src="fotosensayos/17-4-10/1.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/17-4-10/2.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/17-4-10/3.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/17-4-10/4.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/17-4-10/5.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/17-4-10/6.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/17-4-10/7.JPG" zoomToX="243" zoomToY="101" />
<ZoomImage src="fotosensayos/17-4-10/8.JPG" zoomToX="243" zoomToY="101" />
</PhotoShoot>
// _____________________________ End XML ____________________________ -->
</textarea><div class="alternateContent">
<a href="http://www.effectscode.com/Slideshows/PhotoShoot">Photo Shoot flash
effect script</a> requires <a href="http://www.adobe.com/go/getflash/">Flash 9</a>
</div></div>
<script type="text/javascript">ECreplace();</script>
<!-- _______________________ END EFFECTS CODE _________________________ --> </div>
</div>
</div>
</div>
</div>