yes even i checked the page source. there is no reference. and infact now i am accessing the site, logs are not shwoing access to those other sites.it appears that those sites are called at random and not all time just to escape the detectionFOUND IT!!that tongji site is called by .cn site which is called by register.bol.net.in, but NOT all time. i repeatedly called register site but once i noticed this additional line in source First iframe line doesnt appear most of times. so something is indeed fishy.