function linkEmail() {
  if(!document.getElementsByTagName) return;
  var allElts = document.getElementsByTagName("*");
  if(allElts.length == 0 && document.all) 
    allElts = document.all; //hack for IE5
  for(var i=0; i<allElts.length; i++) {
    var elt = allElts[i];
    var className = elt.className || elt.getAttribute("class") 
      || elt.getAttribute("className");
    if(className && className.match(/\bemail\b/)
        && elt.firstChild.nodeType == 3) {
      var addr = elt.firstChild.nodeValue;
      addr = addr.replace(/[ \[\{\(\|\/\\](snabela|at)[ \]\}\)\|\/\\]/i, "@")
        .replace(/[ \[\{\(\|\/\\](punkt|dot|period)[ \]\}\)\|\/\\]/gi, ".");
      var lnk = document.createElement("a");
      lnk.setAttribute("href","mailto:"+addr);
      lnk.appendChild(document.createTextNode(addr));
      elt.replaceChild(lnk, elt.firstChild);
    }
  }
}

window.onload = linkEmail;