How to get rid of ads?

The past few months when I open an email to read it, an ad pops up on the right side and covers part of the email so I can't read it. There is no X on the ad to delete it, so I can never read the email. How can I get rid of these annoying ads? I don't mind the ads IF they do not cover your email. Thank you.

?2014-04-10T16:15:43Z

change your browser to opera use adblock ----stop opening every piece of mail you get
important change all you passwords in any site you go to
and make them hard
google yahoo or any social site you connected to is connected to the bug --beware !!!!
http://www.zdnet.com/google-aws-rackspace-affected-by-heartbleed-openssl-flaw-but-azure-escapes-7000028281/