Plugin REQUEST: Hover HTML formatted popup

I’m looking for a plugin that will allow me to insert html formatted code or straight text into a hover link popup box. NOT looking for a glossary, index, etc where I’d predefined words and site-wide the popup links are created. I have WAY too much data to do this in one spot and need the text formatted. Just a plugin that will allow the user to hover over over a (usually dotted) underscored reference, at which point a box pops up with additional information being referenced. It would be nice if the underlined hover popup text could be created along the lines of a hyperlink; highlight text, click a button, insert text or html formatted text and move on. I have a TON of reference links which open new tabs, just want everything calm, cool and concise on my own site to make it quicker and easier for the viewer.