function fullHeight()
{
  var bodyheight, mincontentheight, contentheight;
  if (self.innerHeight) {
    bodyheight = self.innerHeight;
  } else if (document.documentElement && document.documentElement.clientHeight) {
    bodyheight = document.documentElement.clientHeight;
  } else if (document.body) {
    bodyheight = document.body.clientHeight;
  }
  mincontentheight = bodyheight - 270;
  contentheight = document.getElementById("content").offsetHeight;
  if (contentheight < mincontentheight) {
      document.getElementById("content").style.height = mincontentheight + "px";
  }
}