Binary encoder/decoder functions that let you choose a combiner/joiner for each binary. Live demo on http://www.whak.ca/demo/encode-decode-binary.htm

encode-decode-binary.js

function ascii2binary(e, joiner) {
  return Array.prototype.map.call(e, function(e) {
    var t = e.charCodeAt(0).toString(2);
    return "00000000".substr(t.length) + t;
  }).join(joiner);
}
function binary2ascii(e, joiner) {
  if (!joiner)joiner=" "; //added so you can leave joiner blank e.g. joiner="";
  return e.replace(RegExp(joiner + "*[01]{8}" + joiner + "*", "g"), function(e) {
    return String.fromCharCode(parseInt(e, 2));
  });
}
var txt = "www.WHAK.com", joiner = "\n", encode = ascii2binary(txt, joiner), decode = binary2ascii(encode, joiner);
alert(encode + " = " + decode);

Minified version:

function r(r,n){return Array.prototype.map.call(r,function(r){var n=r.charCodeAt(0).toString(2);return"00000000".substr(n.length)+n}).join(n)}function n(r,n){return r.replace(RegExp(n+"*[01]{8}"+n+"*","g"),function(r){return String.fromCharCode(parseInt(r,2))})}var t="www.WHAK.com",e="\n",o=r(t,e),a=n(o,e);alert(o+" = "+a)