can't get product info Tabs to have correct layout?

[vampirehunter]

i'm having real trouble getting the jquery tab layouts to look like this

 

http://www.asos.com/River-Island/River-Island-Chelsea-Girl-Sleeveless-Waist-Cutwork-Maxi-Dress/Prod/pgeproduct.aspx?iid=3310699&cid=2623&sh=0&pge=0&pgesize=36&sort=-1&clr=Red

 

ive tried all sorts of ways and can't seem to get the tab to remove the bottom border when its selected.