<!-- Original: Gregor (legreg@legreg.de) -->

var ie4 = (document.all) ? true : false;
var ns4 = (document.layers) ? true : false;
var ns6 = (document.getElementById && !document.all) ? true : false;


function hidelayer(lay) {
  if (ie4) {document.all[lay].style.visibility = "hidden";}
  if (ns4) {document.layers[lay].visibility = "hide";}
  if (ns6) {document.getElementById([lay]).style.display = "none";}
}

function writetolayer(lay,txt) {
  if (ie4) {
    document.all[lay].innerHTML = txt;
  }
  if (ns4) {
    document[lay].document.write(txt);
    document[lay].document.close();
  }
  if (ns6) {
    over = document.getElementById([lay]);
    range = document.createRange();
    range.setStartBefore(over);
    domfrag = range.createContextualFragment(txt);
    
     while (over.hasChildNodes()) {
      over.removeChild(over.lastChild);
    }
     over.appendChild(domfrag);
  }
}