delphi 遍历网页中的图片

var
  doc: IHtmlDocument2;
  i: Integer;
  s: String;
begin
  //iFile := WebBrowser1.Document as IPersistFile;
  //iFile.Save('F:\tt.mht', False);
  doc := WebBrowser1.Document as IHtmlDocument2;
  if doc.images.length = 0 then exit;
  Memo1.Clear;
  for i := 0 to doc.images.length-1 do
    with (doc.images.item(i,null) as IHTMLImgElement) do begin
      s := name;
      s := s + ';' + href;
      s := s + ';' + src;
      s := s + ';' + mimeType;
      s := s + ';' + dynsrc;
      s := s + ';' + vrml;
      Memo1.Lines.Add(s);
    end;
end;