gistfile1.rb

require 'selenium/webdriver'

driver = Selenium::WebDriver.for :firefox
driver.get "http://jqueryui.com/demos/slider/range.html"

amount = driver.find_element(:id => "amount")
left, right = driver.find_elements(:class => "ui-slider-handle")

driver.action.click_and_hold(left).perform
until amount[:value].include? "150"
  p :amount => amount[:value]
  driver.action.move_by(5, 0).perform
end
driver.action.release

driver.action.click_and_hold(right).perform
until amount[:value].include? "280"
  p :amount => amount[:value]
  driver.action.move_by(-5, 0).perform
end
driver.action.release

p amount[:value]