what????? I don't think so...
are there virus on chess.com

do a search through the forums. there are a number of discussions about this issue. to answer your question, "No there is no virus."

Chess.com is clean, here is an explination why your program might be reporting otherwise -- http://support.chess.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=699

false positive. anti-virus programs identify "known" viruses through a library. they also detect "suspicious" files through algorithms and heuristics. these can often be wrong. why does this happen? well we have extremely complicated javascript code that determines where your mouse is so that you can move chess pieces around the board. that can look a little suspicious to some AV programs. :)
Virus or unwanted program 'HTML/Crypted.Gen [virus]'
avira antivir result!