I won't believe your style.css is the offender, unless it would really be against their ruels. Didn't you find some webs.com-instructions for that. If not, I think, it would be a good way to ask the people from webs.com directly. What do you think about putting your question there: http://www.webs.com/pages/contact/?
I don't know what webs.com's policy is with respect to external scripts and stylesheets... but you can embed CSS styles into your web pages between the <head> and </head> tags like so:
<style type="text/css" media="all">
your css rules here
Thanks! got it working, now i just need to upload all the image, one more quick question.
if i had something like this
background: url(images/headerbg.png) repeat-x top
how would you put this there instead