function eqh() {
var g = function(e) { return document.getElementById(e); };

for(var i = 0, h = 0, c = 0, l = arguments.length; i < l; ++i)
h = (h < (c = g(arguments[i]).offsetHeight)) ? c : h;

h = h + "px";
for(var i = 0, l = arguments.length; i < l; ++i)
g(arguments[i]).style.height = h;
}

window.onload = function() {
eqh('leftcolumn', 'rightcolumn', 'content');
}

function showBigone(img,xgroesse,ygroesse)
{
Bigwin = window.open (img, "Bild","toolbar=no,status=no,menubars=no,scrollbars=yes,directories=no,resizable=yes,height="+ygroesse+",width="+xgroesse);
Bigwin = Bigwin.window.focus();
}

function schalter() {
   var r = Math.round(Math.random()*15);
   if (r % 2) {
   document.getElementById("bild").style.backgroundColor="#FFd900";
   }
   else {
    document.getElementById("bild").style.backgroundColor="#FFFF00";
   }
  }
  window.setInterval("schalter()", 100);