<!DOCTYPE html> 
<html>
<head>
<title>This tests that iframe can be positioned on odd device pixels.</title>
<style>
  div {
    border: solid 0.5px green; 
    position: fixed;
  }
  
  iframe {
     border: solid 0.5px red;
  }
</style>
</head>
<body>
<p id="container"></p>
<script>
  var container = document.getElementById("container");
  adjustment = 0.1;
  w = 14; h = 14;
  for (i = 0; i < 20; ++i) {
    adjustment+=0.1;
    for (j = 0; j < 15; ++j) {
      var e = document.createElement("div");
      e.style.top = ((w + 1) * i + j * adjustment) + "px";
      e.style.left = ((w + 1) * j + i * adjustment) + "px";
      e.style.width = w + "px";
      e.style.height = h + "px";
      
      var iframe = document.createElement("iframe");
      iframe.style.width = (w - 1) + "px";
      iframe.style.height = (h - 1) + "px";
      
      e.appendChild(iframe);
      container.appendChild(e);
      w+=0.1;
      h+=0.1;
    }
  }
</script>
</body>
</html>