var Base64 = (function make_b64(){
	var map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
	return {
		encode: function(input/*:string*/)/*:string*/ {
			var o = "";
			var c1/*:number*/, c2/*:number*/, c3/*:number*/;
			var e1/*:number*/, e2/*:number*/, e3/*:number*/, e4/*:number*/;
			for(var i = 0; i < input.length; ) {
				c1 = input.charCodeAt(i++);
				e1 = (c1 >> 2);

				c2 = input.charCodeAt(i++);
				e2 = ((c1 & 3) << 4) | (c2 >> 4);

				c3 = input.charCodeAt(i++);
				e3 = ((c2 & 15) << 2) | (c3 >> 6);
				e4 = (c3 & 63);
				if (isNaN(c2)) { e3 = e4 = 64; }
				else if (isNaN(c3)) { e4 = 64; }
				o += map.charAt(e1) + map.charAt(e2) + map.charAt(e3) + map.charAt(e4);
			}
			return o;
		},
		decode: function b64_decode(input/*:string*/)/*:string*/ {
			var o = "";
			var c1/*:number*/, c2/*:number*/, c3/*:number*/;
			var e1/*:number*/, e2/*:number*/, e3/*:number*/, e4/*:number*/;
			input = input.replace(/[^\w\+\/\=]/g, "");
			for(var i = 0; i < input.length;) {
				e1 = map.indexOf(input.charAt(i++));
				e2 = map.indexOf(input.charAt(i++));
				c1 = (e1 << 2) | (e2 >> 4);
				o += String.fromCharCode(c1);

				e3 = map.indexOf(input.charAt(i++));
				c2 = ((e2 & 15) << 4) | (e3 >> 2);
				if (e3 !== 64) { o += String.fromCharCode(c2); }

				e4 = map.indexOf(input.charAt(i++));
				c3 = ((e3 & 3) << 6) | e4;
				if (e4 !== 64) { o += String.fromCharCode(c3); }
			}
			return o;
		}
	};
})();