// This code was written by Tyler Akins and has been placed in the
// public domain.  It would be nice if you left this header intact.
// Base64 code from Tyler Akins -- http://rumkin.com
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
function decode64(input) {
	 var output = "";
	 var chr1, chr2, chr3;
	 var enc1, enc2, enc3, enc4;
	 var i = 0;

	 // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
	 input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

	 do {
			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);
			}
	 } while (i < input.length);

	 return output;
}