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

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("area");
	else links = document.getElementById(id).getElementsByTagName("area");
	for (i = 0; i < links.length; i++)
	{
		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("alt");
	
	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/bt.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 + 10) + "px";
	document.getElementById("btc").style.left = (posx - 20) + "px";
}