browser and screen information

browser information (http header)

accept headertext/html,application/xhtml+xml,text/xml;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
accept charset headerISO-8859-1,utf-8;q=0.7,*;q=0.7
accept encoding headergzip
accept language headeren-us,en;q=0.5
userAgent headerCCBot/1.0 (+http://www.commoncrawl.org/bot.html)