Built-in utilities
The util variable contains general utility methods to help you work with
      data. Unless otherwise specified, all utilities use the UTF-8 character set.
Encoding utils
- 
            
util.urlEncode(String) - 
            
Returns the input string as an
application/x-www-form-urlencodedencoded string. - 
            
util.urlDecode(String) - 
            
Decodes an
application/x-www-form-urlencodedencoded string back to its non-encoded form. util.base64Encode(string) : string- 
            
Encodes the input into a base64-encoded string.
 util.base64Decode(string) : string- 
            
Decodes the data from a base64-encoded string.