Resize iframe

<script>
  function resize(id){
      var width1 = (window.innerWidth > 0) ? window.innerWidth : screen.width;
      var height1 = (window.innerHeight > 0) ? window.innerHeight : screen.height;
      var height1 = height1 * 0.8;
      document.getElementById(id).height = height1;
      document.getElementById(id).width = width1;
    }
</script>