// Modified bubble tooltip script from:
// Bubble Tooltips by Alessandro Fulciniti - http://pro.html.it - http://web-graphics.com

function enableTooltips(id){
	var links,i,h;

	// if they don't have the necessary javascript functions, then bail
	if(!document.getElementById || !document.getElementsByTagName) return;

	// if they element they are loooking for doesn't exist, then bail
	if(!document.getElementById(id)) 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("a");
	else links=document.getElementById(id).getElementsByTagName("a");
	
	for(i=0;i<links.length;i++){
		Prepare(links[i]);
		}
}

function Prepare(el){
	var tooltip,t,b,s,l;
	
	t=el.getAttribute("title");
	
	// Default for links without a title attribute
	if(t==null || t.length==0) t="";
	
	// Create the top part of the markup
	el.removeAttribute("title");
	tooltip=CreateEl("span","tooltip");
	s=CreateEl("span","top");
	s.appendChild(document.createTextNode(t));
	tooltip.appendChild(s);
	
	// Create the bottom part of the markup
	b=CreateEl("b","bottom");

/*
	l=el.getAttribute("href");
	if(l.length>30) l=l.substr(0,27)+"...";
	b.appendChild(document.createTextNode(l));
*/	
	tooltip.appendChild(b);
	
	// Set other events on the link element
	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","/stylesheets/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";
}