    def assert_checkbox_not_selected(checkbox_name)
      @web_browser.checkboxes.each { |checkbox|
				the_element_name = element_name(checkbox)
        if (the_element_name == checkbox_name) then		
	 				if is_selenium_element?(checkbox)
          	perform_assertion {  assert(!checkbox.selected?, "Checkbox #{checkbox_name} is checked unexpectly") }			
					else
          	perform_assertion {  assert(!checkbox.set?, "Checkbox #{checkbox_name} is checked unexpectly") }
					end
        end
      }
    end
