if((mTagID>=eHTMLTag_unknown) & (mTagID<=eHTMLTag_userdefined)){
if((mTagID>=eHTMLTag_unknown) & (mTagID<=eHTMLTag_xmp)){
  inline  PRBool  IsBlockEntity(void) {                     if((mTagID>=eHTMLTag_unknown) & (mTagID<=eHTMLTag_userdefined)){                      return TestBits(mParentBits,kBlockEntity);                    }                     return PR_FALSE;                  }