interface CSSStyleSheet : StyleSheet {
 /* IID: { 0xa6cf90c2, 0x15b3, 0x11d2, \
  { 0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32 } } */

      readonly attribute Node owningNode; 
      readonly attribute StyleSheet parentStyleSheet; 
      readonly attribute wstring href; 
      readonly attribute wstring title; 
      readonly attribute wstring media; 

      readonly attribute CSSStyleRuleCollection cssRules; 

      unsigned long insertRule(in wstring rule, in unsigned long index); 
      void deleteRule(in unsigned long index); 
    };