if (window.addEventListener) {    
    window.addEventListener('load', enableTooltips, false);
}
else {
    if (document.addEventListener)
        document.addEventListener('load', enableTooltips, false);
    else
        if (window.attachEvent)
        window.attachEvent('onload', enableTooltips);
}		

/*javascript for Bubble Tooltips by Alessandro Fulciniti
- http://pro.html.it - http://web-graphics.com */

function enableTooltips() {
    try {
        id = "bubble";
        var links, i, h;
        if (!document.getElementById || !document.getElementsByTagName) return;
        AddCss();
        h = document.createElement("span");
        h.id = "btc";
        h.setAttribute("id", "btc");
        h.style.position = "absolute";
        document.getElementsByTagName("body")[0].appendChild(h);
        if (id == null) links = document.getElementsByTagName("a");
        else links = document.getElementById(id).getElementsByTagName("a");
        
        for (i = 0; i < links.length; i++) {
            Prepare(links[i]);
        }
    }
    catch (e) {}
}

function Prepare(el){
var tooltip,t,b,s,l;
t=el.getAttribute("title");
if(t==null || t.length==0) t="link:";
el.removeAttribute("title");
tooltip=CreateEl("span","tooltip");
s=CreateEl("span","top");
s.appendChild(document.createTextNode(t));
tooltip.appendChild(s);
b = CreateEl("b", "bottom");

l = "";
if(l.length>30) l=l.substr(0,27)+"...";
b.appendChild(document.createTextNode(l));
tooltip.appendChild(b);
setOpacity(tooltip);
el.tooltip=tooltip;
el.onmouseover=showTooltip;
el.onmouseout=hideTooltip;
el.onmousemove=Locate;
}

function showTooltip(e){
document.getElementById("btc").appendChild(this.tooltip);
Locate(e);
}

function hideTooltip(e){
var d=document.getElementById("btc");
if(d.childNodes.length>0) d.removeChild(d.firstChild);
}

function setOpacity(el){
el.style.filter="alpha(opacity:95)";
el.style.KHTMLOpacity="0.95";
el.style.MozOpacity="0.95";
el.style.opacity="0.95";
}

function CreateEl(t,c){
var x=document.createElement(t);
x.className=c;
x.style.display="block";
return(x);
}

function AddCss(){
var l=CreateEl("link");
l.setAttribute("type","text/css");
l.setAttribute("rel","stylesheet");
l.setAttribute("href","../css/estilos.css");
l.setAttribute("media","screen");
document.getElementsByTagName("head")[0].appendChild(l);
}

function Locate(e){
var posx=0,posy=0;
if(e==null) e=window.event;
if(e.pageX || e.pageY){
    posx=e.pageX; posy=e.pageY;
    }
else if(e.clientX || e.clientY){
    if(document.documentElement.scrollTop){
        posx=e.clientX+document.documentElement.scrollLeft;
        posy=e.clientY+document.documentElement.scrollTop;
        }
    else{
        posx=e.clientX+document.body.scrollLeft;
        posy=e.clientY+document.body.scrollTop;
        }
    }
document.getElementById("btc").style.top=(posy-23)+"px";
document.getElementById("btc").style.left=(posx+20)+"px";
}