css variables

I appologise if this subject has been discussed already. I didn't see all the posts. My question is: does anyone know if it is possible to set some sort of variables in css? Even if a style can be based on another style or something?
Thank youHere's some examples (<!-- m --><a class="postlink" href="http://www.svendtofte.com/code/max_width_in_ie/">http://www.svendtofte.com/code/max_width_in_ie/</a><!-- m -->), but it only works in IE.
 
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