| Counter | The Counterinterface is used to represent any counter or
 counters function value. | 
| CSSPrimitiveValue | The CSSPrimitiveValueinterface represents a single CSS value
 . | 
| CSSRule | The CSSRuleinterface is the abstract base interface for any
 type of CSS statement. | 
| CSSRuleList | The CSSRuleListinterface provides the abstraction of an
 ordered collection of CSS rules. | 
| CSSStyleDeclaration | The CSSStyleDeclarationinterface represents a single CSS
 declaration block. | 
| CSSStyleSheet | The CSSStyleSheetinterface is a concrete interface used to
 represent a CSS style sheet i.e., a style sheet whose content type is
 "text/css". | 
| CSSValue | The CSSValueinterface represents a simple or a complex
 value. | 
| Rect | The Rectinterface is used to represent any rect value. | 
| RGBColor | The RGBColorinterface is used to represent any RGB color
 value. |