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if (!String.toSingleByte) {
	String.prototype.toSingleByte = function () {
		return this.replace(/[Ａ-Ｚａ-ｚ０-９]/g, function(s)
		{
			return String.fromCharCode(s.charCodeAt(0) - 0xFEE0);
		});
	};
}
if (!String.toMultiByte) {
	String.prototype.toMultiByte = function () {
		return this.replace(/[A-Za-z0-9]/g, function(s)
		{
			return String.fromCharCode(s.charCodeAt(0) + 0xFEE0);
		});
	};
}