http://biocyc.org/yui/build/assets/skins/sam/treeview.css
http://cs50.tv/lib/yui-2.9.0/build/treeview/assets/skins/sam/treeview.css
http://ecocyc.org/yui/build/assets/skins/sam/treeview.css
http://cs75.tv/lib/yui-2.9.0/build/treeview/assets/skins/sam/treeview.css
http://metacyc.org/yui/build/assets/skins/sam/treeview.css