Rails 3.1 javascript_include_tag

<%= javascript_include_tag 'javascripts/admin/manage_customer.js' %>
   => <script src="/assets/javascripts/admin/manage_customer.js" type="text/javascript"></script开发者_StackOverflow> 

How to generate simple JS link to /javascripts/admin/manage_customer.jsin Rails 3.1?

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Just put a slash before that.

<%= javascript_include_tag '/javascripts/admin/manage_customer.js' %>