trustieforge/app/views/avatar/upload.js.erb

<% if @source_type=='User' %>
var imgSpan = $("img[nhname='avatar_image']");
imgSpan.attr({"src":'<%= "#{@urlfile.to_s}?#{Time.now.to_i}" %>'});
<% else %>
var imgSpan = jQuery('#avatar_image');

imgSpan.attr({"src":'<%= "#{@urlfile.to_s}?#{Time.now.to_i}" %>'});
<% end %>