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);