/*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;
    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("quote");
    if(t==null || t.length==0)
    {
        t="quote:";
    } else {
        t='" '+t+' "';
    }
    el.removeAttribute("quote");
    tooltip=CreateEl("span","tooltip");
    s=CreateEl("span","top");
    s.appendChild(document.createTextNode(t));
    tooltip.appendChild(s);
    b=CreateEl("b","bottom");
    l=el.getAttribute("author");
    if(l.length>60) l=l.substr(0,57)+"...";
    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:99)";
    el.style.KHTMLOpacity="0.99";
    el.style.MozOpacity="0.99";
    el.style.opacity="0.99";
}

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;
            }
        }
    document.getElementById("btc").style.top=(posy+10)+"px";
    document.getElementById("btc").style.left=(posx-20)+"px";
}