I am new to jquery and am using a scrollable script for my new website

http://selsong.com/jenny/jcopyb.html

it is all working fine EXCEPT the arrows do not appear on either side of the scrollable  section.....even though if you place your mouse there is works perfectly.

My question is: Where are those arrows? should the script source them from jqery's website , or should I have them on my computer for them to appear. If I need to have them on my computer, where do I get them from??

Any help would be appreciated

many thanks