Untitled

How to make a website look the same in all browsers and all resolutions?
function autoscale()
  {
  var screenwidth=screen.width;
  var fontsize = screenwidth * 0.0117249;
  /* This number 0.0117249 just happens to work perfectly */
  var fonttext = fontsize + '';
    fontsize = fonttext + 'pt';
    document.body.style.fontSize = fontsize;
    document.body.style.visibility='visible';
    document.body.style.zoom = '100%';
    document.body.style.fontSize = "1em";
  }