問題の配列 http://tech-gym.com/2012/07/%E6%9C%AA%E5%88%86%E9%A1%9E/786.html

gistfile1.js

var board = [
            ["l","h","i","k","o","a","v"],
            ["r","q","s","c","z","l","p"],
            ["u","w","a","l","n","f","o"],
            ["t","y","k","a","j","e","h"],
            ["a","h","i","t","s","y","d"],
            ["e","f","o","p","t","x","n"],
            ["r","u","z","w","y","v","e"]
            ];