Personalizar O Atributo "title"

[Rapper]

Bom fuçando na net, encontrei esse script que personaliza as tags que contem o atributo "title", só que fui testar o script e não funciona... caso alguém saiba o que há de errado, agradeço!

var qTipTag = new Array("a", "abbr", "acronym");
var qTipX = -30;
var qTipY = 25;

tooltip = {
  name : "qTip",
  offsetX : qTipX,
  offsetY : qTipY,
  tip : null
}

tooltip.init = function () {
    var tipNameSpaceURI = "http://www.w3.org/1999/xhtml";
    if(!tipContainerID){ var tipContainerID = "qTip";}
    var tipContainer = document.getElementById(tipContainerID);

    if(!tipContainer) {
      tipContainer = document.createElementNS ? document.createElementNS(tipNameSpaceURI, "div") : document.createElement("div");
        tipContainer.setAttribute("id", tipContainerID);
      document.getElementsByTagName("body").item(0).appendChild(tipContainer);
    }

    if (!document.getElementById) return;
    this.tip = document.getElementById (this.name);
    if (this.tip) document.onmousemove = function (evt) {tooltip.move (evt)};

    var a, sTitle;
    for (var j = 0; j < qTipTag.length; j ++) { // loop que vai implementar o tool-tip nas tags escolhidas
        anchors = document.getElementsByTagName ( qTipTag[j] ); // pegamos a tag escolhida
        
        for (var i = 0; i < anchors.length; i ++) { // atribuicao dos tool tips
            a = anchors[i];
            sTitle = a.getAttribute("title"); // pegamos o atributo title
            if(sTitle) { // se estiver setado
                a.setAttribute("tiptitle", sTitle);
                a.removeAttribute("title");
                a.onmouseover = function() {tooltip.show(this.getAttribute('tiptitle'))};
                a.onmouseout = function() {tooltip.hide()};
            }
        }// fim do for
    }
}

tooltip.move = function (evt) {
    var x=0, y=0;
    if (document.all) {// IE
        x = (document.documentElement && document.documentElement.scrollLeft) ? document.documentElement.scrollLeft : document.body.scrollLeft;
        y = (document.documentElement && document.documentElement.scrollTop) ? document.documentElement.scrollTop : document.body.scrollTop;
        x += window.event.clientX;
        y += window.event.clientY;
        
    } else {//Bons Navegadores
        x = evt.pageX;
        y = evt.pageY;
    }
    this.tip.style.left = (x + this.offsetX) + "px";
    this.tip.style.top = (y + this.offsetY) + "px";
}

tooltip.show = function (text) {
    if (!this.tip) return;
    this.tip.innerHTML = text;
    this.tip.style.display = "block";
}

tooltip.hide = function () {
    if (!this.tip) return;
    this.tip.innerHTML = "";
    this.tip.style.display = "none";
}

window.onload = function () {
    tooltip.init ();
}

CSS

#qTip {
  padding: 3px;
  border: 1px solid #666;
  border-right-width: 2px;
  border-bottom-width: 2px;
  display: none;
  background: #999;
  color: #FFF;
  font: bold 9px Verdana, Arial, Helvetica, sans-serif;
  text-align: left;
  position: absolute;
  z-index: 1000;
}

[Rapper]

ele simplesmente é pra "personalizar a tooltip" do atributo title="".