vigenere.js

var vigenere = function() {
	function pos(s) {
		return s.toLowerCase().charCodeAt(0) - "a".charCodeAt(0);
	};

	function encryptOneChar(c,  key) {
		var src = "abcdefghijklmnopqrstuvwxyz",
			cipher = {};
		for(var i=0; i<src.length; i++) {
			cipher[src[i]] = src[(i+key) % 26];
		}
		return cipher[c];
	}

	return {
		encrypt : function(message, cipher) {

		},

		decrypt : function(message, cipher) {
		}

	};
}();