В коде.
Пример:
procedure TForm1.Button1Click(Sender: TObject);
var
Page: string;
begin
IdHTTP1.AllowCookies := true;
IdHTTP1.HandleRedirects := true;
try
Page := IdHTTP1.Get('http://google.ru');
except
end;
if Pos('{google.ml(new Error("GLMM"),false,{src:g}', Page) <> 0 then...