var BT = BT || {};
(function() {
	BT.Base64 = new Class(
			{
				Implements : [ Options, Events ],
				options : {},
				initialize : function(a) {
					this.setOptions(a)
				},
				keyString : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
				UTF8Encode : function(b) {
					b = b.replace(/\x0d\x0a/g, "\x0a");
					var a = "";
					for ( var e = 0; e < b.length; e++) {
						var d = b.charCodeAt(e);
						if (d < 128) {
							a += String.fromCharCode(d)
						} else {
							if ((d > 127) && (d < 2048)) {
								a += String.fromCharCode((d >> 6) | 192);
								a += String.fromCharCode((d & 63) | 128)
							} else {
								a += String.fromCharCode((d >> 12) | 224);
								a += String.fromCharCode(((d >> 6) & 63) | 128);
								a += String.fromCharCode((d & 63) | 128)
							}
						}
					}
					return a
				},
				UTF8Decode : function(a) {
					var b = "";
					var d = 0;
					var e = c1 = c2 = 0;
					while (d < a.length) {
						e = a.charCodeAt(d);
						if (e < 128) {
							b += String.fromCharCode(e);
							d++
						} else {
							if ((e > 191) && (e < 224)) {
								c2 = a.charCodeAt(d + 1);
								b += String.fromCharCode(((e & 31) << 6)
										| (c2 & 63));
								d += 2
							} else {
								c2 = a.charCodeAt(d + 1);
								c3 = a.charCodeAt(d + 2);
								b += String.fromCharCode(((e & 15) << 12)
										| ((c2 & 63) << 6) | (c3 & 63));
								d += 3
							}
						}
					}
					return b
				},
				base64Encode : function(c) {
					var a = "";
					var k, h, f, j, g, e, d;
					var b = 0;
					c = this.UTF8Encode(c);
					while (b < c.length) {
						k = c.charCodeAt(b++);
						h = c.charCodeAt(b++);
						f = c.charCodeAt(b++);
						j = k >> 2;
						g = ((k & 3) << 4) | (h >> 4);
						e = ((h & 15) << 2) | (f >> 6);
						d = f & 63;
						if (isNaN(h)) {
							e = d = 64
						} else {
							if (isNaN(f)) {
								d = 64
							}
						}
						a = a + this.keyString.charAt(j)
								+ this.keyString.charAt(g)
								+ this.keyString.charAt(e)
								+ this.keyString.charAt(d)
					}
					return a
				},
				base64Decode : function(c) {
					var a = "";
					var k, h, f;
					var j, g, e, d;
					var b = 0;
					c = c.replace(/[^A-Za-z0-9\+\/\=]/g, "");
					while (b < c.length) {
						j = this.keyString.indexOf(c.charAt(b++));
						g = this.keyString.indexOf(c.charAt(b++));
						e = this.keyString.indexOf(c.charAt(b++));
						d = this.keyString.indexOf(c.charAt(b++));
						k = (j << 2) | (g >> 4);
						h = ((g & 15) << 4) | (e >> 2);
						f = ((e & 3) << 6) | d;
						a = a + String.fromCharCode(k);
						if (e != 64) {
							a = a + String.fromCharCode(h)
						}
						if (d != 64) {
							a = a + String.fromCharCode(f)
						}
					}
					a = this.UTF8Decode(a);
					return a
				}
			})
})();