If you manage to pull this off It will be amazing. AFAIK there is no 100% working solution for all A-grade browsers so far.
There are many different hacks and scripts (some rather tedious) but I've yet to see one that would work in FF,IE6,IE7 and Opera. I hope you find a way, though I'm rather sure it might get really difficult. I would even accept a graceful degradation in, say Opera, and wouldn't even mind some twisting of the HTML to get it to work if that's what it takes. Please do keep working on it!
