crear un array bidimensional

Script
function makeArray(length, value) {
  var result = [];
  for (var i = 0; i < length; i++) {
    result.push(value);
  }
  return result;
}

makeArray(10, 10); // [10, 10, 10, 10, 10, 10, 10, 10, 10, 10]