variables.js

var canv = document.getElementById('game')
	,	contxt = canv.getContext('2d')
	,	guess = 3 //猜测的次数
	,	message = "Guess The Letter From a(lower) to z(higher)"//游戏提示
	,	letters = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
	,	today = new Date()//日期显示
	,	letterToGuess = ""//系统随机产生的待猜测的字母
	,	letterToGArray = []//游戏结束时，用于显示待猜测字母
	,	LowerOrHigher = ""//每次键按下后对用户提示
	,	lettersGuessed//存放已经按过的字母
	,	index//待猜测字母在letters数组中的索引值
	,	game = false;//用户猜测成功后为true