4 spaces and you can get code styling:

    Like this

Or rather

    outer: for (var i = 0, j = 0; i < nlen; i++) {
        var nch = needle.charCodeAt(i);
        while (j < hlen) {
          if (haystack.charCodeAt(j++) === nch) {
            continue outer;
          }
        }
        return false;
      }