/*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("span");
	} else {
		links =	document.getElementById(id).getElementsByTagName("span");
	}
	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("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: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","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";
}