I’ve taken Phil’s advice and removed the Javascript from the body’s onload event handler, replacing it with Prototype’s event handler.

<br />
    Event.observe(<br />
             window,<br />
             "load",<br />
         <%= remote_function :url => { :action => "get_prices", :isbn13 => @book.isbn13 },:method => :get %><br />
        );<br />
    <&#47;script><&#47;pre></p>