def style(property = nil)
      assert_exists
      styles = attribute_value('style').to_s.strip
      if property
        properties = Hash[styles.downcase.split(";").map { |p| p.split(":").map(&:strip) }]
        properties[property]				
      else
        styles
      end
    end
def style(property = nil)
      assert_exists
      styles = attribute_value('style').to_s.strip
      if property
        properties = Hash[styles.downcase.split(";").map { |p| p.split(":").map(&:strip) }]
        properties[property]				
      else
        styles
      end
    end
Returns given style property of this element.

 @example
 html.a(:id => "foo").style
 #=> "display: block"
 html.a(:id => "foo").style "display"
 #=> "block"

 @param [String] property
 @return [String]