I've read several blogs discussing the 'hidden content' issue. This article experimented with several options. It concludes that Google DOES index hidden content. The issues is also discussed here. However when I use site: (my hidden content) I do not always see my content indexed. The content is hidden with JavaScript: js_readmore_handle and js_readmore_content. Can anyone explain why hidden content is not always indexed? 
Why is hidden content not always indexed?
seo;javascript;googlebot;indexing;hidden text