This is a nice suggestion.
Today, it's not possible, because the online version does not generate CMAP data (it only generates the image itself).
The good news is that this is not too difficult to implement (it's just a question of time).
There will be to step:
Add CMAP data generation on the online serlvet
Modify the JQuery plugin to use those CMAP data.
We will put news here when this will be working, but don't expect anything before several long weeks (sorry about that)