function menu_content_height() {
  // mekkora a menü
  var menuheight = document.getElementById('menu_container').offsetHeight;
  //alert ('menü:' + menuheight + '\ncontent:' + innercontentheight);
  
  // ha nagyobb a menü, mint a content, akkor méretezés
  if (contentheight-226 < menuheight) {
    //alert(menuheight + ', ' + innercontentheight + ', ' + contentheight);
    //document.getElementById('rightcontent_middle').style.height = (menuheight + 'px');
    //document.getElementById('rightcontent_middle').style.height = (contentheight-281+60 'px');
    var menumiatt = contentheight-menuheight+60;
    document.getElementById('kenyszermagassag').style.height = (menumiatt + 'px');
  }
}