::Yeah, I really like the hover-underlines on links, that your code enables. Much better than the zero-feedback of imagemaps. 
 ::However, I'm not a fan of the text-wrapping, aesthetically or code-complexity wise, that can be seen for example at Chloroplast#Primary endosymbiosis. I'd strongly recommend not using that - Extra Whitespace, and flat-sided paragraphs, are definitely preferable. 
 ::Thanks again for the explanations and details, both here and the other thread. (I keep hoping that's a diagram of the Calvin cycle... ;)  –