var res = new Object();

  function getResolution()
  {
    var width;
    var height;

    if(window.innerWidth)
    {
      width = window.innerWidth;
      height_off = window.pageYOffset;
      height = window.innerHeight;
    } 
    else if(document.body.clientWidth)
    {
      width = document.body.clientWidth;
      height_off = document.body.scrollTop;
      height = document.body.clientHeight;
    }
    else if(document.documentElement.clientWidth)
    {
      width = document.documentElement.clientWidth;
      height_off = document.documentElement.scrollTop;
      height = document.documentElement.clientHeight;
    }
    res.width = width;
    res.height = height;
    res.hoffset = height_off;
    mainDivHeight();
    res.height = height + height_off;
    moveBottomDiv();
    res.height = height_off;
    moveTopDiv();
  }

function mainDivHeight()
{
  var oWidth = 950;
  //document.getElementById("middle").style.left = ((res.width - oWidth) / 2) + "px";
  document.getElementById("middle").style.height = (res.height - 130) + "px";
}

function moveBottomDiv()
{
  var oElement = document.getElementById("bottom");
  var oElement2 = document.getElementById("bottom_casing");
  var oHeight = 40;
  var oWidth = 950;
  var newpos_top = res.height - oHeight;
  var newpos_left = (res.width - oWidth ) / 2;
  //oElement.style.left = newpos_left + "px";
  
  oElement2.style.top = newpos_top + "px";
  oElement2.style.left = "0px";
  //setTimeout("getResolution()", 0);
}

function moveTopDiv()
{
  var oElement = document.getElementById("top");
  var oElement2 = document.getElementById("top_casing");
  var oWidth = 950;
  var newpos_top = res.height;
  var newpos_left = (res.width - oWidth ) / 2;
  //oElement.style.left = newpos_left + "px";
  
  oElement2.style.top = newpos_top + "px";
  oElement2.style.left = "0px";
  //setTimeout("getResolution()", 0);
}

if(document.addEventListener)
{
  document.addEventListener("DOMContentLoaded", getResolution, false);
}
else
{
  document.write('<script type="text/javascript" id="contentloadtag" defer="defer" src="javascript:void(0)"><\/script>');
  contentloadtag.onreadystatechange=function(){
    if(this.readyState=="complete")
      getResolution();
  }
}