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

function enableTooltips(id){
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("img");
		for(i=0;i<links.length;i++){
				 Prepare(links[i]);
		}
	
}else {
		xx=document.getElementById(id);
		 Prepare(xx);
}	
	
	
}

function Prepare(el){
var tooltip,t,b,s,l;
t=el.getAttribute("title");
//t=t.replace(/\n/g , '<br />');
if(t==null || t.length==0) t="";
el.removeAttribute("title");

tooltip=CreateEl("span","tooltip");
ss=CreateEl("b","top");
tooltip.appendChild(ss);
s=CreateEl("span","body");
s.appendChild(document.createTextNode(t));
s.innerHTML=t;
tooltip.appendChild(s);
b=CreateEl("b","bottom");
//l=el.getAttribute("href");
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:90)";
	el.style.KHTMLOpacity="0.90";
	el.style.MozOpacity="0.90";
	el.style.opacity="0.90";
}

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

function Locate(e){
var posx=0,posy=0;
var delta_x=70, delta_y=20;
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+delta_y)+"px";
document.getElementById("btc").style.left=(posx-delta_x)+"px";
}