/**
     * jQuery BASE64 functions
     * 
     *     <code>
     *         Encodes the given data with base64. 
     *         String $.base64Encode ( String str )
     *        <br />
     *         Decodes a base64 encoded data.
     *         String $.base64Decode ( String str )
     *     </code>
     * 
     * Encodes and Decodes the given data in base64.
     * This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.
     * Base64-encoded data takes about 33% more space than the original data. 
     * This javascript code is used to encode / decode data using base64 (this encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean). Script is fully compatible with UTF-8 encoding. You can use base64 encoded data as simple encryption mechanism.
     * If you plan using UTF-8 encoding in your project don't forget to set the page encoding to UTF-8 (Content-Type meta tag). 
     * This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin.
     * 
     * Example
     *     Code
     *         <code>
     *             $.base64Encode("I'm Persian."); 
     *         </code>
     *     Result
     *         <code>
     *             "SSdtIFBlcnNpYW4u"
     *         </code>
     *     Code
     *         <code>
     *             $.base64Decode("SSdtIFBlcnNpYW4u");
     *         </code>
     *     Result
     *         <code>
     *             "I'm Persian."
     *         </code>
     * 
     * @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >
     * @link http://www.semnanweb.com/jquery-plugin/base64.html
     * @see http://www.webtoolkit.info/
     * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
     * @param {jQuery} {base64Encode:function(input))
     * @param {jQuery} {base64Decode:function(input))
     * @return string
     */
    
    (function($){
        
        var keyString = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
        
        var uTF8Encode = function(string) {
            string = string.replace(/\x0d\x0a/g, "\x0a");
            var output = "";
            for (var n = 0; n < string.length; n++) {
                var c = string.charCodeAt(n);
                if (c < 128) {
                    output += String.fromCharCode(c);
                } else if ((c > 127) && (c < 2048)) {
                    output += String.fromCharCode((c >> 6) | 192);
                    output += String.fromCharCode((c & 63) | 128);
                } else {
                    output += String.fromCharCode((c >> 12) | 224);
                    output += String.fromCharCode(((c >> 6) & 63) | 128);
                    output += String.fromCharCode((c & 63) | 128);
                }
            }
            return output;
        };
        
        var uTF8Decode = function(input) {
            var string = "";
            var i = 0;
            var c = c1 = c2 = 0;
            while ( i < input.length ) {
                c = input.charCodeAt(i);
                if (c < 128) {
                    string += String.fromCharCode(c);
                    i++;
                } else if ((c > 191) && (c < 224)) {
                    c2 = input.charCodeAt(i+1);
                    string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                    i += 2;
                } else {
                    c2 = input.charCodeAt(i+1);
                    c3 = input.charCodeAt(i+2);
                    string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                    i += 3;
                }
            }
            return string;
        }
        
        $.extend({
            base64Encode: function(input) {
                var output = "";
                var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
                var i = 0;
                input = uTF8Encode(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 + keyString.charAt(enc1) + keyString.charAt(enc2) + keyString.charAt(enc3) + keyString.charAt(enc4);
                }
                return output;
            },
            base64Decode: 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 = keyString.indexOf(input.charAt(i++));
                    enc2 = keyString.indexOf(input.charAt(i++));
                    enc3 = keyString.indexOf(input.charAt(i++));
                    enc4 = keyString.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 = uTF8Decode(output);
                return output;
            }
        });
    })(jQuery);