tasetta on "Trying to replace css border properties with an image, (twentythirteen child)"

on wwww.iconoclasticpress.com/draft where I'm working out a new wordpress site using a child of twenty-thirteen, I'm puzzling how to change those thin white lines around main menu navigation, end of articles, between article and footer.

I want to change the borders to images that looks like a long line of ink (similar to what's above and below the masthead/site's name) to divide up the page sections.

The files are oldLines2.png and oldLine1.png.

I'm trying to figure out the proper path to use in CSS to the images
for instance this:

#article {border-image:URL("../../uploads/2013/12/oldLines2.png");}

and variations of this isn't working. Where am I wrong?