Customizing forum style width for all Display resolutions

[onlinejalsa]

Hello,

I would like to know how to keep my forum width to left side and add some blocks on right side of my VB homepage. I followed the below code and edited it in my css file. But i cant see the same fixed length on all resolutions. how can i make it same for all resolution desktops/laptops/tablet

I made changes using my 24 inches monitor and it looks good. but if i see from any other laptop with digfferent resolutions, my forum blocks are going to left side.
how can i make it Even for all resolutions

First edit the vbulletin.css template and find this code:
Code:

margin: {vb:stylevar doc_margin};

change it to
Code:

margin: auto; ( auto or left or right)

Then in Style Variable Editor in Common group find doc_width (Document Width)
change Units to PX
and Size to XXX (example 800)

XXX is your forum width size