Browser Issue

Hi

My website size is 800x 900 with a background image size 1200x1200 and the content is centered in the middle of a browser, the left and right side has spaces left because the browser size is bigger. Is it possible to let 800x900 of the site touches the left edge of the browser when the browser is shrunk down to a size that's smaller than 800x900. Is there a way to bypass that so that the left edge of the site goes beyond the left edge of the browser?

Thank you

 

is the background image full size? or you can replace it with a 1px*1200px one?

 

The back ground is a full size image 1200x1200 and all the contents on the site is placed on the image according to whats on the image.