/*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("img");
    else links = document.getElementById(id).getElementsByTagName("img");
    for (i = 0; i < links.length; i++) {
        Prepare(links[i]);
    }
}

function Prepare(el) {
    var tooltip, t, b, s, l;
    t = el.getAttribute("alt");
    if (t == null || t.length == 0) t = "";
    el.removeAttribute("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));
    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", "Style/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";
}