snippet.txt

<input type="hidden" id="x_something" value="1" />

<%= periodically_call_remote  :update => 'some shit',
                              :url => {:action => :action_name},
                              :condition => "$('x_something') == '1'",
                              :frequency => 2.0 %>
                              
                              

# then...

just set the hidden field to 0 or something else when you want it to stop