Rails - Apr 2006 - changing visual_effect defaults

what is the correct syntax for changing an effect like :highlight? i 
tried looking through the api, and found it, but i can''t seem to get it
right.

i want to change the start color of visual_effect(:highlight, 
''user-list''). i tried visual_effect(:highlight,
''user-list'', :startcolor
= ''#990000'') and several other variations of that, but i
can''t seem to
get it right.

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i think i have solved that problem. i ended up with:
visual_effect(:highlight, ''user-list'', {
"startcolor" => "''#990000''" })

but i do have another question. the visual_effect changes the entire 
list. how can i extract the id of the item that was moved so that i 
could have an effect on just that item?

here is the script i am using -

in my view:
<h2><%= @user_list.full_name %>''s Tasks</h2>
<ul id="user-list">
	<% @user_list.tasks.each do |task| -%>
	<li id="item_<%= task.id %>">
		<%= task.task_name %>
	</li>
	<% end %>
</ul>
<%= sortable_element ''user-list'',
	:url => { :action => ''sort'', :id => @user_list },
	:complete => visual_effect(:highlight, ''user-list'', {
"startcolor" =>
"''#990000''" })
%>

in my controller:
  def sort
    @user_list = User.find(params[:id])
    @user_list.tasks.each do |task|
      task.position = params[''user-list''].index(task.id.to_s)
+ 1
      task.save
    end
    render :nothing => true
  end

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