Stupid question from a newbie

Hi everyone:
I,m using the following code and I have some questions

<%= link_to_remote( "Show Body", :update => "comment_#{comment.id.to_s}", :url => { :action => :show_body, :id => comment }) %>

what exactly do :update,:url,:id, I mean what is the action they done??

Other question

I want to refresh an image, but the image is not a class of the code,
because Iuse the image tag, I dont know where I have to start for do
that, anyone can give me a tip

Thanks

Guille S. wrote:

<%= link_to_remote( "Show Body", :update => "comment_#{comment.id.to_s}", :url => { :action => :show_body, :id => comment }) %>

The official documentation for link_to_remote explains this probably
better than I could myself:
http://www.railsbrain.com/api/rails-2.3.2/doc/index.html?a=M002467&name=link_to_remote

Basically though, :update is the id of the DOM element to be updated
(

…content…
. URL in this case is the
“show_body” action of the current controller with the id of the current
comment.

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