var wWidth = 500;
var wHeight = 500;
var headerHeight = 80;
var menuWidth = 144;
var mainLeft = menuWidth;
var mainTop = headerHeight;
function getWindowSize()
{
  if (document.documentElement)   // for IE6
  {
    wWidth = document.documentElement.clientWidth;
    wHeight = document.documentElement.clientHeight;
  }
  else if (document.body)         // for IE5x
  {
    wWidth = document.body.clientWidth;
    wHeight = document.body.clientHeight;

  }
  else                            // for all others
  {
    wWidth = window.innerWidth;
    wHeight = window.innerHeight;
  }
}

function composePage()
{
  getWindowSize();
  var obj = document.getElementById("main");
  var h = wHeight - mainTop;
  var w = wWidth - mainLeft;
  if (w > 0)
    obj.style.width = w + "px";
  if (h > 0)
  {
    obj.style.height = h + "px";
    obj = document.getElementById("menu");
   obj.style.height = h + "px";
  }

  obj = document.getElementById("mainTable");
  if (obj)
  {
    w -= 40;
    if (w > 0)
      obj.style.width = w + "px";
  }
}