JavaScript Base64 Encode/Decode

base64_encode_decode.js

//Encode
function encodeBase64( string ){

	try{
		if( typeof string == 'object'){
			throw 'error';
		}
		return window.btoa(unescape(encodeURIComponent( string )));
	} catch(e){
		return false;
	}

}

//Decode
function decodeBase64( string ){

	try {
		if( typeof string != 'string'){
			throw 'error';
		}
		return decodeURIComponent(escape(window.atob( string )));
	} catch(e){
		return false;
	}

}

var code = encodeBase64('Hello. How are You?');
console.log( code );

var string = decodeBase64(code);
console.log( string );