扩展watir底层，调用visible返回对象是否可见

class Watir::Element

 
  def visible?
 
    ōbject = document
    while object
      begin
        if object.currentstyle.invoke('visibility') =~ /^hidden$/i

          return false
        end
        if object.currentstyle.invoke('display') =~ /^none$/i

          return false
        end
        if object.invoke('isDisabled')
          return false
        end
      rescue WIN32OLERuntimeError
      end
      ōbject = object.parentElement
    end
    true
  end
end

watir脚本：

require 'watir'
include Watir

ie = IE.new
ie.goto("www.someplace.com")
button = ie.button(:id, 'somebutton')
if button.visible? '调用visible方法
  button.click
else
  ie.close
end