Using Ubuntu (13.10) and Chromium and you need to use silverlight?

You can start by installing Wine, using IE etc... IE = MS, yek ;)

You can also install pipelight. But, before installing, !CLOSE YOUR BROWSER!

Then, start a terminal (ctrl+alt+t) and enter the following commands:

sudo apt-add-repository ppa:ehoover/compholio
sudo apt-add-repository ppa:mqchael/pipelight
sudo apt-get update
sudo apt-get install pipelight

Wait a while, accept the license and once installed, start your browser.

Check this site for more info: