var idDOM=0;
var allDOM=0;
var layDOM=0;
var DHTML=0;

if (document.getElementById) 
{
  idDOM=1;
  DHTML=1;
} 
else 
{
    if (document.all) 
    {
        
        allDOM=1;
        DHTML=1;
      } 
    else 
    {
        browserVersion=parseInt(navigator.app-version);
        if ((navigator.appName.indexOf('Netscape')!=1) && (browserVersion==4)) 
        {
          layDOM=1;
          DHTML=1;
        }
    }
}

function crossDOM(Stil,ObjID) 
{
    if (idDOM) 
    {
        if (Stil==1) 
        {
              return (document.getElementById(ObjID).style);
        } 
        else 
        {
            return (document.getElementById(ObjID));
        }
      }
      if (allDOM) 
    {
        if (Stil==1) 
        {
              return (document.all[ObjID].style);
        } 
        else 
        {
              return (document.all[ObjID]);
        }
      } 
    else 
    {
        if (layDOM) 
        {
              return (document.layers[ObjID]);
        }
      }
}

function objHeight(ObjID) 
{
    var dom=crossDOM(0,ObjID);
      if (dom.offsetHeight) 
    {
        return dom.offsetHeight;
      }
      if (layDOM) 
    {
        return dom.clip.height;
      } 
    else 
    {
        return (0);
      }
}


    var links = objHeight("links");
    var mitte = objHeight("mitte");
    var rechts = objHeight("rechts");

if(links>=mitte && links>=rechts)
{
    document.getElementById("mitte").style.height=links+"px";
    document.getElementById("rechts").style.height=links+"px";
}
if(mitte>=links && mitte>=rechts)
{
    document.getElementById("links").style.height=mitte+"px";
    document.getElementById("rechts").style.height=mitte+"px";
}
if(rechts>=links && rechts>=mitte)
{
    document.getElementById("links").style.height=rechts+"px";
    document.getElementById("mitte").style.height=rechts+"px";
}