function layoutColumns() {
    if (document.getElementById){
      var newHeight = document.getElementById('pageContent').offsetHeight;
      var newHeight = newHeight - 20;

      if (document.getElementById('topContent')){
        var newHeight = newHeight - document.getElementById('topContent').offsetHeight;
      }

      document.getElementById('leftContent').style.height=newHeight+"px";
      document.getElementById('middleContent').style.height=newHeight+"px";
      document.getElementById('minorContent').style.height=newHeight+"px";
    }
  }