Rails - May 2006 - JavaScript Prompt and link_to_remote

Hi all,

I would like to get one of the parameters for a link_to_remote with  
JavaScript prompt. So far I have this:

link_to_remote(image_tag("/images/interface/add.png"),
   :before => "$name = prompt(''Name?'')",
   :url => { :action => ''add_child'', :id => node,
:name => XXX },
   :update => "node_list_#{node.id}",
   :position => ''top'',
   :complete => visual_effect(:highlight, "node_list_#{node.id}")
   )

I get prompted for the name. How do I add it to the parameter list,  
i.e. what do I have to put in the place of XXX on the third line above?

Many thanks in advance,
Nickolay