BrowserWar will help you to fight off evil browsers that access your website. It allows you to display custom messages to any browser/version

script/plugin install git://github.com/sagebit/browser_war.git

startbrowserwar() is the central mathod of the plugin, and it takes many parameters, but these are the defaults:

startbrowserwar({:browsers => browserwarbrowsersdefault, :message => browserwarmessagedefault, :options => browserwaroptionsdefault})

In your layouts:

...

    <%= javascript_include_tag(:defaults, 'browserDetect', 'browserWar') %>

...

*Note: Please refer to the README for more details.