Usually if one has to deal with web-browser development and especially in scientific areas, we have to deal with lots of applications that run on the client side. Often they are controlled using java applets, javascript, ajax etc... If you are not at all into webserver development, it can be a pain just to get into a new programming language again. One popular programming language is python (although some might not agree with me here....get your hands on it, you'll see). So it would be actually really nice to be able to use python for such a task if you are familiar with it (would save you lots of time). 

Right now, there is no stable software to do this, however there is Skulpt that intends to go into that direction and honestly it looks quite promising. Check out the examples on the website of Skulpt. I'll try to set up some more complex things using skulpt as soon as I can and report some case studies here (notably thinking of controlling pymol via a webbrowser and things like that...to simply encompass the need of  molecular viewers and other applets available online that are somehow less user friendly than software installed on your machine).

Voyons ;)

Peter