Template:Switch B

Purpose
A switching template used to make passing parameters to the Border-radius template a little easier. Choices:


 * -top-right = -top-right (passes the same value back, to select the top right corner)
 * -top-left = -top-left (passes same back for the top left corner)
 * -bottom-right = -bottom-right (passes same back for the bottom right corner)
 * -bottom-left = -bottom-left (passes same back for the bottom left corner)
 * tr = -top-right
 * TR = -top-right
 * tl = -top-left
 * TL = -top-left
 * br = -bottom-right
 * BR = -bottom-right
 * bl = -bottom-left
 * BL = -bottom-left

An empty value returns nothing (used for selecting all four corners by default). Any other values will also return nothing.