one-1 _ orig:".colmask", often called "container"
one-2 _ orig:".colmid"
one-3 _ orig:".colleft"
one-3a-left _ orig:""
one-3b-center _ orig:""
one-3.c-right _ orig:""
2.1_
2.2_
2.3_
2.3.a_left (2)
2.3.b_center (1)
2.3.c_right (3)
http://matthewjamestaylor.com/blog/perfect-3-column.htm
