function getDim (axis) {
  if (typeof (window.innerHeight) == 'number' ) {
    //Non-IE
    myHeight = window.innerHeight;
    myWidth = window.innerWidth;
  } else if (document.documentElement && (document.documentElement.clientHeight)) {
    //IE 6+ in 'standards compliant mode'
    myHeight = document.documentElement.clientHeight;
    myWidth = document.documentElement.clientWidth;
  } else if (document.body && (document.body.clientHeight)) {
    //IE 4 compatible
    myHeight = document.body.clientHeight;
    myWidth = document.body.clientWidth;
  }
  if (axis == "width") {
    return myWidth;
  } else {
    return myHeight;
  }
}