/* Copyright owned by Alessandro Fulciniti */

function enableTooltips()
{
var links,i,h,subStringLinkID;
if(!document.getElementById || !document.getElementsByTagName) return;
h=document.createElement("span");
h.id="btc";
h.setAttribute("id","btc");
h.style.position="absolute";
document.getElementsByTagName("body")[0].appendChild(h);
links=document.getElementsByTagName("a");
	for(i=0;i<links.length;i++)
	{
		subStringLinkID = links[i].id;
		if(subStringLinkID.indexOf("tooltip") != -1)
		{
			Prepare(links[i]);
		}
	}
}

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=el.getAttribute("href");
if(l.length>28) l=l.substr(0,25)+"...";
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:85)";
el.style.KHTMLOpacity="0.85";
el.style.MozOpacity="0.85";
el.style.opacity="0.85";
}

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

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;
      	}
	}
	if (e.clientY > (window.screen.availHeight/2))
	{	   
	   posy -= 275; // top position modified to prevent the tooltip from hiding below the client window.
	   document.getElementById("btc").className = "tooltip_down";
	}
	else
	{
		document.getElementById("btc").className = "tooltip_up";
	}
	document.getElementById("btc").style.top=(posy+10)+"px";
	document.getElementById("btc").style.left=(posx-10)+"px";
}