<!DOCTYPE html>
<html>
<head>
<title>This tests if negative coordinate values round to the same position as if they were positive.</title>
<style>
  .inner {
    position: relative;
    top: 0px;
    left: 0px;
    width: 2px;
    height: 2px;
    border: solid black 0.5px;
  }

  .outer {
    position: absolute;
    top: 0px;
    left: 0px;
  }
</style>
</head>
<body>
<p id="container"></p>
<script>
  var container = document.getElementById("container");
  for (i = 0; i < 40; ++i) {
    adjustment = 0;
    for (j = 0; j < 40; ++j) {
      var outer = document.createElement("div");
      outer.style.top = 7 * (i + j * adjustment)  + "px";
      outer.style.left = 7 * (j + i * adjustment)  + "px";
      outer.className = "outer";

      var inner = document.createElement("div");
      inner.style.top = (-adjustment) + "px";
      inner.style.left = (-adjustment) + "px";
      inner.className = "inner";
      adjustment += 0.01;
      
      outer.appendChild(inner);
      container.appendChild(outer);
    }
  }
</script>
</body>
</html>