It depends upon which country you belogs to. Some countries recognises and some company treat this as illegal please check your county’s rules and regulations to find out the correct position.
regarding the legality of the site an article has recently published on the blog which gives information regarding this matter.
There is no U.S. federal law against gambling online! According to federal law (or rather, the lack of a law against it), online gambling is in fact perfectly legal. U.S. Attorney Catherine Hanaway admitted in a 2007 House hearing that just placing wagers online doesn’t violate federal law.