BaseCode = function () {  
   
    // private property  
    _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; 
    _keyStr32 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
    // public method for encoding  
    this.encode64 = function (input) {  
        var output = "";  
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;  
        var i = 0;  
        input = _utf8_encode(input);  
        while (i < input.length) {  
            chr1 = input.charCodeAt(i++);  
            chr2 = input.charCodeAt(i++);  
            chr3 = input.charCodeAt(i++);  
            enc1 = chr1 >> 2;  
            enc2 = ((chr1 & 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;  
            }  
            output = output +  
            _keyStr32.charAt(enc1) + _keyStr32.charAt(enc2) +  
            _keyStr32.charAt(enc3) + _keyStr32.charAt(enc4);  
        }  
        return output;  
    };
    
    this.encode32 = function (input) {  
        var output = "";  
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4, enc5, enc6, enc7, enc8;  
        var i = 0;  
        input = _utf8_encode(input);  
        while (i < input.length) {  
            chr1 = input.charCodeAt(i++);  
            chr2 = input.charCodeAt(i++); 
            chr3 = input.charCodeAt(i++);
            chr4 = input.charCodeAt(i++);
            chr5 = input.charCodeAt(i++);
            
            enc1 = chr1 >> 3;
            enc2 = (chr1 & 7)<<2 | (chr2>>6);
            enc3 = (chr2 & 63)>>1;
            enc4 = ((chr2 & 1)<<4) | (chr3>>4);
            enc5 = ((chr3 & 15) <<1) | (chr4>>7);
            enc6 = (chr4 & 127) >>2;
            enc7 = ((chr4 & 3)<<3) | (chr5>>5);
            enc8 = (chr5 & 31);
            
            if (isNaN(chr2)) {  
                enc3 = enc4 = enc5 = enc6 = enc7 = enc8 = 64;  
            } else if (isNaN(chr3)) {  
            	enc5 = enc6 = enc7 = enc8 = 64;  
            } else if (isNaN(chr4)) {  
            	enc6 = enc7 = enc8 = 64;  
            } else if (isNaN(chr5)) {  
            	enc8 = 64;  
            } 
            output = output +  
            _keyStr32.charAt(enc1) + _keyStr32.charAt(enc2) +  
            _keyStr32.charAt(enc3) + _keyStr32.charAt(enc4) +
            _keyStr32.charAt(enc5) + _keyStr32.charAt(enc6) +
            _keyStr32.charAt(enc7) + _keyStr32.charAt(enc8);
        }  
        return output;  
    }; 
   
    // public method for decoding  
    this.decode32 = function (input) {  
        var output = "";  
        var chr1, chr2, chr3, chr4, chr5;  
        var enc1, enc2, enc3, enc4, enc5, enc6, enc7, enc8;  
        var i = 0;  
        input = input.replace(/[^ABCDEFGHIJKLMNOPQRSTUVWXYZ234567]/g, "");  
        while (i < input.length) {
        	
            enc1 = _keyStr32.indexOf(input.charAt(i++));  
            enc2 = _keyStr32.indexOf(input.charAt(i++));  
            enc3 = _keyStr32.indexOf(input.charAt(i++));  
            enc4 = _keyStr32.indexOf(input.charAt(i++));  
            enc5 = _keyStr32.indexOf(input.charAt(i++));  
            enc6 = _keyStr32.indexOf(input.charAt(i++));  
            enc7 = _keyStr32.indexOf(input.charAt(i++));  
            enc8 = _keyStr32.indexOf(input.charAt(i++));
//            console.log(enc1,enc2,enc3,enc4,enc5,enc6,enc7,enc8);
	        chr1 = (enc1 << 3) | (enc2 >> 2);  
            chr2 = ((enc2 & 3) << 6) | (enc3 << 1) | (enc4 >> 4);  
            chr3 = ((enc4 & 15) << 4) | (enc5 >>1 );
            chr4 = ((enc5 & 1) << 7) | (enc6 << 2) | (enc7 >> 3);
            chr5 = ((enc7 & 7) << 5) |  enc8;
//            console.log(chr1,chr2,chr3,chr4,chr5)
//            console.log("*************");
            if(chr1 !=0)
            {
	            output = output + String.fromCharCode(chr1);
            }
            if(chr2 !=0)
            {
	            if (enc3 != 0 || enc4 != 0 ) {  
	                output = output + String.fromCharCode(chr2);  
	            }
            }
            if(chr3 !=0)
            {
	            if (enc4 != 0 || enc5 != 0 ) {  
	                output = output + String.fromCharCode(chr3);  
	            }
            }
            if(chr4 !=0)
            {
	            if (enc5 != 0 || enc6 != 0 || enc7 != 0) {  
	                output = output + String.fromCharCode(chr4);  
	            }
            }
            if(chr5 !=0)
            {
	            if (enc7 != 0 || enc8 != 0 ) {  
	                output = output + String.fromCharCode(chr5);  
	            }
            }
        } 
//        console.log(output);
        output = _utf8_decode(output);
        return output;  
    }  
    
    // public method for decoding  
    this.decode64 = function (input) {  
        var output = "";  
        var chr1, chr2, chr3;  
        var enc1, enc2, enc3, enc4;  
        var i = 0;  
        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");  
        while (i < input.length) {  
            enc1 = _keyStr.indexOf(input.charAt(i++));  
            enc2 = _keyStr.indexOf(input.charAt(i++));  
            enc3 = _keyStr.indexOf(input.charAt(i++));  
            enc4 = _keyStr.indexOf(input.charAt(i++));  
            chr1 = (enc1 << 2) | (enc2 >> 4);  
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);  
            chr3 = ((enc3 & 3) << 6) | enc4;  
            output = output + String.fromCharCode(chr1);  
            if (enc3 != 64) {  
                output = output + String.fromCharCode(chr2);  
            }  
            if (enc4 != 64) {  
                output = output + String.fromCharCode(chr3);  
            }  
        }  
        output = _utf8_decode(output);  
        return output;  
    };
   
    // private method for UTF-8 encoding  
    _utf8_encode = function (string) {  
        string = string.replace(/\r\n/g,"\n");  
        var utftext = "";  
        for (var n = 0; n < string.length; n++) {  
            var c = string.charCodeAt(n);  
            if (c < 128) {  
                utftext += String.fromCharCode(c);  
            } else if((c > 127) && (c < 2048)) {  
                utftext += String.fromCharCode((c >> 6) | 192);  
                utftext += String.fromCharCode((c & 63) | 128);  
            } else {  
                utftext += String.fromCharCode((c >> 12) | 224);  
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);  
                utftext += String.fromCharCode((c & 63) | 128);  
            }  
   
        }  
        return utftext;  
    };
   
    // private method for UTF-8 decoding  
    _utf8_decode = function (utftext) {  
        var string = "";  
        var i = 0;  
        var c = c1 = c2 = 0;  
        while ( i < utftext.length ) {  
            c = utftext.charCodeAt(i);  
            if (c < 128) {  
                string += String.fromCharCode(c);  
                i++;  
            } else if((c > 191) && (c < 224)) {  
                c2 = utftext.charCodeAt(i+1);  
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));  
                i += 2;  
            } else {  
                c2 = utftext.charCodeAt(i+1);  
                c3 = utftext.charCodeAt(i+2);  
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));  
                i += 3;  
            }  
        }  
        return string;  
    };
}