Anyone get frozen up when going on Myspace

[musiclawyer]

When loggign onto my home page at myspace I immediatelly receive this popup saying "pc virus scan" with the safari logo in the backgdrop. I click no and the popup does not go away and I can't clear the popup or do anything else other than force quit, and start all over. I don't think I've ever received a popup on my macbook until then and that's the only site where this has happened. Any suggestions or tips?