background-image css code query

[axi]

Hi ppl

I have a question which i hope some can answer, i am in the process of modding my skin and i have realised i have a main header image in the middle and beside this header are is 1 small jpg that joins and loops from both sides so it is a continous loop for a fluid skin

so in my css somewhere it has

background-image: url(skindirectory/misc/page_background.gif);
background-repeat: repeat-x;

I am wondering, if i am able to set a designated image to repeat for the left, and a designated image for the right?

How would i do this is it possible?