text: QUnit.module('DOM StyleSheet Level 2')
  /******************************************************************************
  
  13 November, 2000
  1. Document Object Model Style Sheets
  
  Editors
      Chris Wilson, Microsoft Corp.
      Philippe Le Hégaret, W3C
      Vidur Apparao, Netscape Communications Corp.
  
  Table of contents
  
      * 1.1. Introduction
      * 1.2. Style Sheet Interfaces
            o StyleSheet, StyleSheetList, MediaList
      * 1.3. Document Extensions
            o LinkStyle, DocumentStyle
      * 1.4. Association between a style sheet and a document.
  
  1.1. Introduction
  
  The DOM Level 2 Style Sheet interfaces are base interfaces used to represent
  any type of style sheet. The expectation is that DOM modules that represent a
  specific style sheet language may contain interfaces that derive from these
  interfaces.
  
  The interfaces found within this section are not mandatory. A DOM application
  may use the hasFeature(feature, version) method of the DOMImplementation
  interface with parameter values "StyleSheets" and "2.0" (respectively) to
  determine whether or not this module is supported by the implementation. In
  order to fully support this module, an implementation must also support the
  "Core" feature defined defined in the DOM 2 Core specification [DOM Level 2
  Core]. Please refer to additional information about conformance in the DOM
  Level 2 Core specification [DOM Level 2 Core].
  ******************************************************************************/
  /******************************************************************************
  
  1.2. Style Sheet Interfaces
  
  This set of interfaces represents the generic notion of style sheets.
  
  Interface StyleSheet (introduced in DOM Level 2)
  
      The StyleSheet interface is the abstract base interface for any type of
      style sheet. It represents a single style sheet associated with a
      structured document. In HTML, the StyleSheet interface represents either an
      external style sheet, included via the HTML LINK element, or an inline
      STYLE element. In XML, this interface represents an external style sheet,
      included via a style sheet processing instruction.
  
  
      IDL Definition
  
          // Introduced in DOM Level 2:
          interface StyleSheet {
            readonly attribute DOMString        type;
                     attribute boolean          disabled;
            readonly attribute Node             ownerNode;
            readonly attribute StyleSheet       parentStyleSheet;
            readonly attribute DOMString        href;
            readonly attribute DOMString        title;
            readonly attribute MediaList        media;
          };
  ******************************************************************************/
  /******************************************************************************
  
  
      Attributes
  
          disabled of type boolean
              false if the style sheet is applied to the document. true if it is
              not. Modifying this attribute may cause a new resolution of style
              for the document. A stylesheet only applies if both an appropriate
              medium definition is present and the disabled attribute is false.
              So, if the media doesn't apply to the current user agent, the
              disabled attribute is ignored.
  ******************************************************************************/
  /******************************************************************************
          href of type DOMString, readonly
              If the style sheet is a linked style sheet, the value of its
              attribute is its location. For inline style sheets, the value of
              this attribute is null. See the href attribute definition for the
              LINK element in HTML 4.0, and the href pseudo-attribute for the XML
              style sheet processing instruction.
  ******************************************************************************/
  /******************************************************************************
          media of type MediaList, readonly
              The intended destination media for style information. The media is
              often specified in the ownerNode. If no media has been specified,
              the MediaList will be empty. See the media attribute definition for
              the LINK element in HTML 4.0, and the media pseudo-attribute for
              the XML style sheet processing instruction . Modifying the media
              list may cause a change to the attribute disabled.
  ******************************************************************************/
  /******************************************************************************
          ownerNode of type Node, readonly
              The node that associates this style sheet with the document. For
              HTML, this may be the corresponding LINK or STYLE element. For XML,
              it may be the linking processing instruction. For style sheets that
              are included by other style sheets, the value of this attribute is
              null.
  ******************************************************************************/
  /******************************************************************************
          parentStyleSheet of type StyleSheet, readonly
              For style sheet languages that support the concept of style sheet
              inclusion, this attribute represents the including style sheet, if
              one exists. If the style sheet is a top-level style sheet, or the
              style sheet language does not support inclusion, the value of this
              attribute is null.       
  ******************************************************************************/
  /******************************************************************************
          title of type DOMString, readonly
              The advisory title. The title is often specified in the ownerNode.
              See the title attribute definition for the LINK element in HTML
              4.0, and the title pseudo-attribute for the XML style sheet
              processing instruction.
  ******************************************************************************/
  /******************************************************************************
          type of type DOMString, readonly
              This specifies the style sheet language for this style sheet. The
              style sheet language is specified as a content type (e.g.
              "text/css"). The content type is often specified in the ownerNode.
              Also see the type attribute definition for the LINK element in HTML
              4.0, and the type pseudo-attribute for the XML style sheet
              processing instruction.
  ******************************************************************************/
  /******************************************************************************
  
  Interface StyleSheetList (introduced in DOM Level 2)
  
      The StyleSheetList interface provides the abstraction of an ordered
      collection of style sheets.
      
      The items in the StyleSheetList are accessible via an integral index,
      starting from 0.
  
  
      IDL Definition
  
          // Introduced in DOM Level 2:
          interface StyleSheetList {
            readonly attribute unsigned long    length;
            StyleSheet         item(in unsigned long index);
          };
  ******************************************************************************/
  /******************************************************************************
  
  
      Attributes
  
          length of type unsigned long, readonly
              The number of StyleSheets in the list. The range of valid child
              stylesheet indices is 0 to length-1 inclusive.
  ******************************************************************************/
  /******************************************************************************
  
      Methods
  
          item
              Used to retrieve a style sheet by ordinal index. If index is
              greater than or equal to the number of style sheets in the list,
              this returns null.
              
              Parameters
  
              index of type unsigned long
                  Index into the collection
  
              Return Value
  
              StyleSheet
  
              The style sheet at the index position in the StyleSheetList, or
              null if that is not a valid index.
              
              No Exceptions
  ******************************************************************************/
  /******************************************************************************
  
  Interface MediaList (introduced in DOM Level 2)
  
      The MediaList interface provides the abstraction of an ordered collection
      of media, without defining or constraining how this collection is
      implemented. An empty list is the same as a list that contains the medium
      "all".
      
      The items in the MediaList are accessible via an integral index, starting
      from 0.
  
  
      IDL Definition
  
          // Introduced in DOM Level 2:
          interface MediaList {
                     attribute DOMString        mediaText;
                                          // raises(DOMException) on setting
  
            readonly attribute unsigned long    length;
            DOMString          item(in unsigned long index);
            void               deleteMedium(in DOMString oldMedium)
                                                  raises(DOMException);
            void               appendMedium(in DOMString newMedium)
                                                  raises(DOMException);
          };
  ******************************************************************************/
  /******************************************************************************
  
  
      Attributes
  
          length of type unsigned long, readonly
              The number of media in the list. The range of valid media is 0 to
              length-1 inclusive.
  ******************************************************************************/
  /******************************************************************************
          mediaText of type DOMString
              The parsable textual representation of the media list. This is a
              comma-separated list of media.
              
              Exceptions on setting
  
              DOMException
              	
  
              SYNTAX_ERR: Raised if the specified string value has a syntax error
              and is unparsable.
              
              NO_MODIFICATION_ALLOWED_ERR: Raised if this media list is
              readonly.
  ******************************************************************************/
  /******************************************************************************
  
      Methods
  
          appendMedium
              Adds the medium newMedium to the end of the list. If the newMedium
              is already used, it is first removed.
              
              Parameters
  
              newMedium of type DOMString
                  The new medium to add.
  
              Exceptions
  
              DOMException
  
              INVALID_CHARACTER_ERR: If the medium contains characters that are
              invalid in the underlying style language.
              
              NO_MODIFICATION_ALLOWED_ERR: Raised if this list is readonly.
              
              No Return Value
  ******************************************************************************/
  /******************************************************************************
              
          deleteMedium
              Deletes the medium indicated by oldMedium from the list.
              Parameters
  
              oldMedium of type DOMString
                  The medium to delete in the media list.
  
              Exceptions
  
              DOMException
  
              NO_MODIFICATION_ALLOWED_ERR: Raised if this list is readonly.
  
              NOT_FOUND_ERR: Raised if oldMedium is not in the list.
  
              No Return Value
  ******************************************************************************/
  /******************************************************************************
  
          item
              Returns the indexth in the list. If index is greater than or equal
              to the number of media in the list, this returns null.
              
              Parameters
  
              index of type unsigned long
                  Index into the collection.
  
              Return Value
  
              DOMString
  
              The medium at the indexth position in the MediaList, or null if
              that is not a valid index.
  
              No Exceptions
  ******************************************************************************/
  /******************************************************************************
  
  1.3. Document Extensions
  
  Interface LinkStyle (introduced in DOM Level 2)
  
      The LinkStyle interface provides a mechanism by which a style sheet can be
      retrieved from the node responsible for linking it into a document. An
      instance of the LinkStyle interface can be obtained using binding-specific
      casting methods on an instance of a linking node (HTMLLinkElement,
      HTMLStyleElement or ProcessingInstruction in DOM Level 2).
  
      IDL Definition
  
          // Introduced in DOM Level 2:
          interface LinkStyle {
            readonly attribute StyleSheet       sheet;
          };
  ******************************************************************************/
  /******************************************************************************
  
      Attributes
  
          sheet of type StyleSheet, readonly
              The style sheet.
  ******************************************************************************/
  /******************************************************************************
  
  Interface DocumentStyle (introduced in DOM Level 2)
  
      The DocumentStyle interface provides a mechanism by which the style sheets
      embedded in a document can be retrieved. The expectation is that an
      instance of the DocumentStyle interface can be obtained by using
      binding-specific casting methods on an instance of the Document interface.
  
  
      IDL Definition
  
          // Introduced in DOM Level 2:
          interface DocumentStyle {
            readonly attribute StyleSheetList   styleSheets;
          };
  ******************************************************************************/
  /******************************************************************************
  
      Attributes
  
          styleSheets of type StyleSheetList, readonly
              A list containing all the style sheets explicitly linked into or
              embedded in a document. For HTML documents, this includes external
              style sheets, included via the HTML LINK element, and inline STYLE
              elements. In XML, this includes external style sheets, included via
              style sheet processing instructions (see [XML-StyleSheet]).
  ******************************************************************************/
  /******************************************************************************
  
  1.4. Association between a style sheet and a document.
  
  HTML and Style Sheet Creation
      A style sheet can be associated with an HTMLDocument in one of two ways:
  
          * By creating a new LINK HTML element (see the HTMLLinkElement
            interface in the [DOM Level 2 HTML] and [HTML4.0]). The underlying
            style sheet will be created after the element is inserted into the
            document and both the href and the type attribute have been set in a
            way indicating that the linked object is a style sheet. 
  ******************************************************************************/
  /******************************************************************************
          * By creating
            a new STYLE HTML element (see the HTMLStyleElement interface in the
            [DOM Level 2 HTML] and [HTML4.0]). The underlying style sheet will be
            created after the element is inserted into the document and the type
            attribute is set in a way indicating that the element corresponds to
            a style sheet language interpreted by the user agent.
  ******************************************************************************/
  /******************************************************************************
  
  HTML and Style Sheet Removal
      Removing a LINK HTML element or a STYLE HTML element removes the underlying
      style sheet from the style sheet collection associated with a document.
      Specifically, the removed style sheet is no longer applied to the
      presentation of the document.
  ******************************************************************************/
  /******************************************************************************
  XML and Style Sheet Creation
      A new style sheet can be created and associated with an XML document by
      creating a processing instruction with the target 'xml-stylesheet'
      [XML-StyleSheet] and inserting it into the document.
  ******************************************************************************/
  /******************************************************************************
  XML and Style Sheet Removal
      Removing a processing instruction with a target of 'xml-stylesheet'
      [XML-StyleSheet] removes the underlying style sheet from the style sheet
      collection associated with a document. Specifically, the removed style
      sheet is no longer applied to the presentation of the document.
  
  ******************************************************************************/
  /******************************************************************************
  
  ******************************************************************************/