html - CSS - design parent class if child has a specific class

Possible Duplicate:
Complex CSS selector for parent of active child
Is there a CSS parent selector?

Is there a way to design parent class based on if its child elements has a specific class?

   

      text
   

.

   

      text
   

I want to design the first .container differently based on if the child class is content1 or content2.
It must be pure css solution, without javascript.