matchColumns = function()
{
  var divs,contDivs,maxHeight,divHeight,d;
  divs = document.getElementsByTagName('div');
  contDivs = [];
  maxHeight = 0;
  for(var i = 0;i < divs.length;i++)
  {
    if(/\bcolumn\b/.test(divs[i].className))
    {
      d = divs[i];
      contDivs[contDivs.length] = d;
      if(d.offsetHeight)
      {
        divHeight = d.offsetHeight;
      }
      else if(d.style.pixelHeight)
      {
        divHeight = d.style.pixelHeight;
      }
      maxHeight = Math.max(maxHeight,divHeight);
    }
  }
  for(var i = 0;i < contDivs.length;i++)
  {
    contDivs[i].style.height = maxHeight + "px";
  }
}

window.onload = function()
{
  if(document.getElementsByTagName)
  {
    matchColumns();
  }
}