function hoehe()
{
   if(document.getElementById('content').offsetHeight)
   {
      var div_heights = new Array(
        document.getElementById('content').offsetHeight,
        document.getElementById('left').offsetHeight,
        document.getElementById('right').offsetHeight);
      div_heights = div_heights.reverse(div_heights.sort(num_sort));
      var style_height = div_heights[0] + "px";
      document.getElementById('left').style.height = style_height;
      document.getElementById('content').style.height = style_height;
      document.getElementById('right').style.height = style_height;
   }
}

function num_sort(a,b) 
{ 
  return a-b; 
}

function grossbild(seite,b,h)
{
  var a=window.open(seite,"","width="+b+",height="+h+",left=100,top=100");
}