try{
    var smiles = new Smiles();
    var i = document.evaluate("//div[@id='bd']/div[@class='messages']/div[@class='comment']/div/div[3]", document, null, XPathResult.ANY_TYPE, null);
    var c;
    var comments = [document.evaluate("//div[@id='bd']/div[@class='messages']/div/div[3]", document, null, XPathResult.ANY_TYPE, null).iterateNext()];
    while(c = i.iterateNext()) {
      comments.push(c);
    }
    for(var j = 0; j < comments.length; ++j) {
      var comment = comments[j];
      smiles.replace(comment);
    }
  } catch(e) {
    //console.error(e);
  }