How do you sort an array on multiple columns?

If owner names differ, sort by them. Otherwise, use publication name for tiebreaker.

function mysortfunction(a, b) {

  var o1 = a[3].toLowerCase();
  var o2 = b[3].toLowerCase();

  var p1 = a[1].toLowerCase();
  var p2 = b[1].toLowerCase();

  if (o1 < o2) return -1;
  if (o1 > o2) return 1;
  if (p1 < p2) return -1;
  if (p1 > p2) return 1;
  return 0;
}

I think what you're looking for is thenBy.js: https://github.com/Teun/thenBy.js

It allows you to use the standard Array.sort, but with firstBy().thenBy().thenBy() style.

An example can be seen here.