two dimensional array random generator jQuery

All rows always have same numbers, why? They should take random number to populate it. Also, how can I repair it? Once I saw answer here but now I cannot find it.

var mapSizex = 5;
var mapSizey = 6;
var mapArray = [];

$(function() {
  console.log("ready!");
  $('#map-draw').html(drawMap());
});

function mapGenerator() {
  for (i = 0; i < mapSizex; i++) {
    for (x = 0; x < mapSizey; x++) {
      mapArray[i, x] = getRandom(1, 5);
    }
  }
}

function drawMap() {
  mapGenerator();
  var map = '';
  tileID = 0;
  for (i = 0; i < mapSizex; i++) {
    map = map + '<br style="clear: both;">';
    for (x = 0; x < mapSizey; x++) {
      map = map + '<div class="tile tileID' + tileID + '">' + mapArray[i, x] + '</div>';
      tileID++;
    }
  }
  return map;
}

function getRandom(min, max) {
  var x = Math.floor((Math.random() * max) + min);
  return x;
}

.tile {
  float: left;
  height: 20px;
  width: 20px;
  border: 1px solid black;
  text-align: center;
}

<script src="http://ift.tt/1oMJErh"></script>
<div id="main-container">
  <div id="map-container">
    <div id="map-draw"></div>
  </div>
</div>

To post it I need to add some more content but all included information's should be enough to find what I mean.