Encoding to binary:
'hello'.replace(/./g, function(c) {
function pad(n) { return (n > 0) ? ('0' + pad(n - 1)) : ''; }
var s = c.charCodeAt(0).toString(2);
return pad(8 - s.length) + s;
});
Decoding binary to a string:
'011101110110111101110111'.replace(/.{8}/g, function(s) {
return String.fromCharCode(parseInt(s, 2));
});