An object with all 16:9 pairs

gistfile1.js

var findPairs = function() {
  var height;
  var numPairs = {};
  var width = 450;
  while (width <= 1280) {
    height = width * 9 / 16;
    if (!(height % 1) ){
      numPairs[width] = height;
    }
    width += 1;
  }
  return numPairs;
};