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

function enableTooltips(id){
	
	if(!document.getElementById("btc"))
	{	
		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("a");
	//else links=document.getElementById(id).getElementsByTagName("a");
	
	if(id==null) links=document.getElementsByTagName("img");
	else links=document.getElementById(id).getElementsByTagName("img");
	
	for(i=0;i<links.length;i++)
	{
		Prepare(links[i]);
	}
  
	enabled = true;
}

function Prepare(el){	
	var tooltip,t,b,s,l;
	//t=el.getAttribute("title");
	//t=el.getAttribute("alt");
	t=el.getAttribute("infotext");
	if(t==null || t.length==0) t="";
	//el.removeAttribute("alt");
	//el.setAttribute("alt", "");
	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>30) l=l.substr(0,27)+"...";
	//b.appendChild(document.createTextNode(l));
	b.appendChild(document.createTextNode(''));
	tooltip.appendChild(b);
	setOpacity(tooltip);
	el.tooltip=tooltip;
	el.onmouseover=showTooltip;
	el.onmouseout=hideTooltip;
	el.onmousemove=Locate;
}

function showTooltip(e)
{
	if(document.getElementById("btc") && this.tooltip)
	{
		document.getElementById("btc").appendChild(this.tooltip);
		Locate(e);
	}	
}

function hideTooltip(e)
{
	var d = document.getElementById("btc");
	
	if(d && 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/BubbleTooltips.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;
    }
  }
	if(document.getElementById("btc"))
	{
		document.getElementById("btc").style.top=(posy+10)+"px";
		document.getElementById("btc").style.left=(posx-20)+"px";
	}
}