How to have “Show Sidebar” ON – (Hide Sidebar) when page is load? (instead of having it close, I means you should click to ii “Show Sidebar” in order to see that column?

Hi, 
Here is a screenshot of default  position of “Show Sidebar” it is OFF:
https://drive.google.com/file/d/0B86sFSu5-0BWUzZDczVKaGh4SEE/view?usp=sharing
Here is a screenshot when is ON and I would like to have open “Sidebar” as default value when page is load!?
https://drive.google.com/file/d/0B86sFSu5-0BWb1JySmxGSFFRanc/view?usp=sharing
How I can do that?

Here is an link of that page:
http://www.imc-website-test.info/rings.html

I tried to play around with Custom Design of that page, but it was unsuccessful, here is an link/image of that page as well:
https://drive.google.com/file/d/0B86sFSu5-0BWNHBHVEhSS25FWlU/view?usp=sharing

Let me know what is a trick?

Thank you,
b