Rails tooltip application helper code

tooltip_helper.rb

def with_tooltip(tool_tip_text, options={}, &block)
  content = capture(&block)
  opts = tag_options(options[:html]);

  uid = "tooltipjs_#{get_uid}"

  js = %{
    var parent = $('#{uid}').up();
    var trigger = parent.getElementsByClassName('TooltipTrigger')[0] || parent;
    var tooltip = parent.getElementsByClassName('Tooltip')[0];
    tooltip.trigger = trigger;
  }

  if options[:event].to_s == "click"
    show_handler = "function(e) { ttip_skip = this.trigger; showTooltip(this);}"
    hide_handler = "function(e) { (ttip_skip == this.trigger) ?  ttip_skip = null : this.hide() }"

    js << "Event.observe(trigger, 'click', #{show_handler}.bindAsEventListener(tooltip));"
    js << "Event.observe(document, 'click', #{hide_handler}.bindAsEventListener(tooltip));"
  else
    js << "Event.observe(trigger, 'mouseover', function() { showTooltip(this);}.bind(tooltip));"
    js << "Event.observe(trigger, 'mouseout', tooltip.hide.bind(tooltip))"
  end

  concat("<span style='position:relative' #{opts}>",  block.binding)
  concat(content,  block.binding)
  concat("<div style='display:none' class='Tooltip'><span>#{tool_tip_text}</span></div>", block.binding)
  concat(javascript_tag(js, :id => uid), block.binding)
  concat("</span>", block.binding)
end

def get_uid
  session[:dom_uid] ||= 0
  session[:dom_uid] += 1
end