target=:
_top: Opens the linked document in the full body of the window
_blank: Opens the linked document in a new window or tab
_self: Opens the linked document in the same frame as it was
clicked (this is default)
_parent: Opens the linked document in the parent frame
framename: Opens the linked document in a named frame
From http://www.w3schools.com/tags/att_a_target.asp