Random String of n characters

random_string

function randomString(n) {
  var str = "";
  for (var i=0; i<n; i++) {
    str += String.fromCharCode(Math.floor(Math.random()*26 + 97))
  }
  return str;
}

randomString(5) // => "xkcdy"
randomString(7) // => "idhmtus"