function resize_content()
{
    var contentDiv = document.getElementById("middle");
    var leftDiv = document.getElementById("sidebar-left");
    var rightDiv = document.getElementById("sidebar-right");
    if ( leftDiv && rightDiv )
    {
      if ( leftDiv.offsetHeight < contentDiv.offsetHeight - 65 )
      {
          leftDiv.style.height = (contentDiv.offsetHeight - 65) + 'px';
      }
      if ( rightDiv.offsetHeight < contentDiv.offsetHeight - 65 )
      {
          rightDiv.style.height = (contentDiv.offsetHeight - 65) + 'px';
      }
      if ( leftDiv.offsetHeight < rightDiv.offsetHeight )
      {
          leftDiv.style.height = (rightDiv.offsetHeight -10) + 'px';
      }
      else if ( leftDiv.offsetHeight > rightDiv.offsetHeight )
      {
          rightDiv.style.height = (leftDiv.offsetHeight - 10) + 'px';
      }
    }
}