bottom border code

I have a lace border on the top of my site and want it to be along the bottom as well but i can’t figure out how alter the code.
here is the image of the lace border: sugar︵‿୨♡୧‿︵lace

and here is the code i have used:
<div style="height:50px; margin-top:0px; margin-left:0px; opacity:0.9; background:url('http://media.tumblr.com/6663c96b11c68ea5142d08c5ea986646/tumblr_inline_mrjfpo5YiO1rw2o8m.png') repeat-x left top; width:100%; position:fixed; z-index:9999;"></div>

you can view my homepage to see what i mean.
~thank you in advance!~

The page I need help with: [log in to see the link]