module ApplicationHelper

  def select_dropover_field(object_name, method, tag_options = {}, dropover_options = {}, object = nil)
    tag = ::ActionView::Helpers::InstanceTag.new(object_name, method, self, nil, object)
    tag_options = { :tag => "span",
                    :id => "#{object_name}_#{method}_#{tag.object.id}_select_dropover",
                    :class => "select_dropover_field",
                  }.merge!(tag_options)
    dropover_options = {
                        :id => "#{object_name}_#{method}_#{tag.object.id}_SDO",
                        :backgroundcolor => "getBackgroundColor('#{tag_options[:id]}')",
                       }.merge!(dropover_options)
    dropover_options[:url] = dropover_options[:url] || url_for({:controller => "/" + object_name.to_s.pluralize, :action => "set_#{object_name}_#{method}", :id => tag.object.id })
    content_tag(tag_options.delete(:tag), tag_options.delete(:content), tag_options) + select_dropover(tag_options[:id], dropover_options.delete(:id), dropover_options)
  end
  
  def select_dropover(field_id, object_id, options = {})

    function = "var #{object_id} = "
    function << "new SelectDropOver("
    function << "'#{field_id}', "
    function << "'#{url_for(options[:url])}', "

    [:options, :url, :current].each { |k| options[k] = options[k].to_json if options[k] }

    function << options_for_javascript(options)
    function << ')'
    javascript_tag(function)
  end

end