Alert box that only shows once [closed]

Alert box that only shows once [closed]

References

Reference NO 1

http://stackoverflow.com/questions/13975718/javascript-alert-box-only-once-when-the-user-lands

Reference NO 2

http://stackoverflow.com/questions/10903526/how-to-toggle-a-bootstrap-alert-on-and-off-with-button-click

Reference NO 3

http://www.javascriptkit.com/script/script2/alertmsg.shtml

Reference NO 4

http://www.webdeveloper.com/forum/showthread.php?232956-Alert-Box-w-cookie

Reference NO 5

http://www.nngroup.com/articles/windows-8-disappointing-usability/

Reference NO 6

http://www.javascriptsource.com/cookies

Reference NO 7

http://www.melonfire.com/community/columns/trog/print.php?id=232

Reference NO 8

http://www.webmastertools.fm/how-to/Showing+alert+box+after+%26%2339%3B