gistfile1.js

function BiSequence(binaries){
   this.BI_STR_LEN = 8;
   this.binaries = binaries;
 }

 BiSequence.prototype.toString = function(binaries){
   var msg = "";
   var result = 0;

   for(var i = 0; i < this.binaries.length; i++){
     for(var j = 0; j < this.BI_STR_LEN; j++){
       result = result * 2 + parseInt(this.binaries[i][[j]]);
     }
     msg += String.fromCharCode(result);
     result = 0;
   }

   return msg;
 }

function Main(){
  input = prompt("What is your number: ");
  var regex = /(0|1){8}/g
  var sequence = new BiSequence(input.match(regex));
  confirm(sequence.toString());
}

Main();