The DOMImplementation interface represent an object providing methods which are
not dependent on any particular document. Such an object is returned by the
« DOM Reference « DOMImplementation
Creates and returns an HTML Document.
Returns a Boolean indicating if a given feature is supported or not.
Returns a Boolean indicating if a given feature is supported or not. This function
is unreliable and kept for compatibility purpose alone: except for SVG-related
queries, it always returns true. Old browsers are very inconsistent in their