/**

	 * 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);