if ((navigator.appVersion.toLowerCase().indexOf('msie') > -1) &&
    document.getElementById &&
    document.getElementById("column1") &&
    document.getElementById("column2") &&
    document.getElementById("bottom_content"))
{
  var longestLayoutColumnId = "column2";
  if (document.getElementById("column1").offsetHeight >
      document.getElementById("column2").offsetHeight)
  {
    longestLayoutColumnId = "column1";
  }
  if (document.getElementById("bottom_content").offsetHeight <
document.getElementById(longestLayoutColumnId).offsetHeight)
  {
    document.getElementById("bottom_content").style.height =
     document.getElementById(longestLayoutColumnId).offsetHeight+"px";
}
}