var Base64 = { _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", encode: function(a) { var b = ""; var c, chr2, chr3, enc1, enc2, enc3, enc4; var i = 0; a = Base64._utf8_encode(a); while (i < a.length) { c = a.charCodeAt(i++); chr2 = a.charCodeAt(i++); chr3 = a.charCodeAt(i++); enc1 = c >> 2; enc2 = ((c & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63; if (isNaN(chr2)) { enc3 = enc4 = 64 } else if (isNaN(chr3)) { enc4 = 64 } b = b + this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) + this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4) } return b }, decode: function(a) { var b = ""; var c, chr2, chr3; var d, enc2, enc3, enc4; var i = 0; a = a.replace(/[^A-Za-z0-9\+\/\=]/g, ""); while (i < a.length) { d = this._keyStr.indexOf(a.charAt(i++)); enc2 = this._keyStr.indexOf(a.charAt(i++)); enc3 = this._keyStr.indexOf(a.charAt(i++)); enc4 = this._keyStr.indexOf(a.charAt(i++)); c = (d << 2) | (enc2 >> 4); chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); chr3 = ((enc3 & 3) << 6) | enc4; b = b + String.fromCharCode(c); if (enc3 != 64) { b = b + String.fromCharCode(chr2) } if (enc4 != 64) { b = b + String.fromCharCode(chr3) } } b = Base64._utf8_decode(b); return b }, _utf8_encode: function(a) { a = a.replace(/\r\n/g, "\n"); var b = ""; for (var n = 0; n < a.length; n++) { var c = a.charCodeAt(n); if (c < 128) { b += String.fromCharCode(c) } else if ((c > 127) && (c < 2048)) { b += String.fromCharCode((c >> 6) | 192); b += String.fromCharCode((c & 63) | 128) } else { b += String.fromCharCode((c >> 12) | 224); b += String.fromCharCode(((c >> 6) & 63) | 128); b += String.fromCharCode((c & 63) | 128) } } return b }, _utf8_decode: function(a) { var b = ""; var i = 0; var c = c1 = c2 = 0; while (i < a.length) { c = a.charCodeAt(i); if (c < 128) { b += String.fromCharCode(c); i++ } else if ((c > 191) && (c < 224)) { c2 = a.charCodeAt(i + 1); b += String.fromCharCode(((c & 31) << 6) | (c2 & 63)); i += 2 } else { c2 = a.charCodeAt(i + 1); c3 = a.charCodeAt(i + 2); b += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); i += 3 } } return b } }