function noSpam() {
    if (document.getElementById) {
  var at = "@";
    var links = document.getElementsByTagName('a');
   
    for (var i = 0; i < links.length; i++) {
     var linkElem = links[i];
   
     if (linkElem.className == 'escape') {
      var mail = linkElem.firstChild; var domain = linkElem.lastChild;
      mail.nextSibling.firstChild.innerHTML = at;
      linkElem.href = "mailto:" + mail.data + at + domain.data;
     }
   
    } // End for
   
    } // End if
}


//Onload-Methode ohne Prototype:
window.onload = noSpam;

//Event.observe(window, 'load', noSpam, false);