/*script per i bubble tooltips - http://pro.html.it */

function enableTooltips(id){
var links,i,h;
if(!document.getElementById || !document.getElementsByTagName) return;

h=document.createElement("span");
h.id="btc";
h.style.height="300";
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++){
    var coursename = links[i].getAttribute("coursename");
    if(coursename != null) Prepare(links[i]);    
  }
}

function Prepare(el)
{
var tooltip,coursename,price,duration,s,s2,s3,s4;//,b,l;

tooltip=CreateEl("span","tooltip");
//tooltip.style.height = "200";

s=CreateEl("span","top");
s.appendChild(document.createTextNode(" "));
tooltip.appendChild(s);

// get attributes
coursename=el.getAttribute("coursename");
price=el.getAttribute("price");
duration=el.getAttribute("duration");

// create a course name
s1=CreateEl("b","top");
s1.appendChild(document.createTextNode(coursename));
if((price == null) && (duration == null)) 
  s1.innerHTML = "<BR/>" + s1.innerHTML;
tooltip.appendChild(s1);



// create a duration
s3=CreateEl("b","top");
s3.appendChild(document.createTextNode((duration == null)?"":duration));
if(s3.innerHTML == "") s3.innerHTML = "<BR/>";
tooltip.appendChild(s3);

// create a price
s2=CreateEl("b","top");
s2.appendChild(document.createTextNode((price == null)?"":price));
if(s2.innerHTML == "") s2.innerHTML = "<BR/>";
tooltip.appendChild(s2);

s4=CreateEl("b","bottom"); 
tooltip.appendChild(s4);

setOpacity(tooltip);
el.tooltip=tooltip;
el.onmouseover=showTooltip;
el.onmouseout=hideTooltip;
el.onmousemove=Locate;

//prompt("outerHTML", tooltip.outerHTML)
}

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","bubble.css");
l.setAttribute("media","screen");
document.getElementsByTagName("head")[0].appendChild(l);
}

function Locate(e){
var posx=0,posy=0;
var posxAdd=5,posyAdd=152;
if(navigator.userAgent.indexOf("Firefox")!=-1){
posyAdd=147;
}
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.left=(posx-posxAdd)+"px";
document.getElementById("btc").style.top=(posy-posyAdd)+"px";
}