I'm not sure.
:S
You mentioned something about the main content, and also about the full details - my brain can't figure out how you've got things setup.
With jQuery, you can do something along the lines of:
code:
<a href="spectra1.jpg" onclick="$j('img#spectra').attr('src','spectra1.jpg').show(); return false">view spectra</a>
And then under the content you have
code:
<img id="spectra" src="" alt="" style="display:none;"/>
Which isn't perfect but should work.