// uniTip - written by Nathan Ford for Unit Interactive
//
// uniTip is based on qTip:
// qTip - CSS Tool Tips - by Craig Erskine
// http://qrayg.com

var uniTipTag = "a,img"; //Which tag do you want to uniTip-ize? Keep it lowercase. No spaces around commas.//
var uniTipClass = "tip"; //Which classes do you want to uniTip-ize? If you leave this blank, then all the tags designated above will get uniTip-ized. Match case. No spaces around commas.

var uniTipX = 0; // X offset from cursor//
var uniTipY = 15; // Y offset from cursor//

//______________________________________________There's no need to edit anything below this line//

var offsetX = uniTipX, offsetY = uniTipY, elewidth = null, eleheight = null, tipid = null, tiptop = null, tipbot = null, tipcapin = null, tippointin = null, altText = false;

var x = 0, y = 0, WinWidth = 0, WinHeight = 0, TipWidth = 0, TipHeight = 0, CapHeight = 0, PointHeight = 0;

// first, find all the correct elements
init = function() {
    inicijaliziraj();
}

function inicijaliziraj() {
    var elementList = uniTipTag.split(",");
    for (var j = 0; j < elementList.length; j++) {
        var elements = document.getElementsByTagName(elementList[j]);

        if (elements) {
            for (var i = 0; i < elements.length; i++) {
                if (uniTipClass != '') {

                    var elClass = elements[i].className;
                    var elClassList = uniTipClass.split(",");

                    for (var h = 0; h < elClassList.length; h++) { if (elClass.match(elClassList[h])) unitipize(elements[i]); }

                } else unitipize(elements[i]);
            }
        }
    }
}

// next, add the tooltip function to those elements
unitipize = function(element) {
    var a = element;
    altText = (a.alt && a.getAttribute("alt") != '') ? true : false;
    var sTitle = (altText == true) ? a.getAttribute("alt") : a.getAttribute("title");
    if (sTitle) {
        a.onmouseover = function() { build(a, sTitle); };
        a.onmouseout = function() { hide(a, sTitle); };
    }
}

// now, we build the tooltip
build = function(a, sTitle) {

    if (a.title) a.title = "";
    if (altText == true) a.alt = "";

    var tipContainer = document.createElement("div");
    tipContainer.setAttribute("id", "unitip");
    document.body.appendChild(tipContainer);

    var tipContainerTop = document.createElement("div");
    tipContainerTop.setAttribute("id", "unitippoint");
    tipContainer.appendChild(tipContainerTop);

    var tipContainerMid = document.createElement("div");
    tipContainerMid.setAttribute("id", "unitipmid");
    tipContainer.appendChild(tipContainerMid);

    var tipContainerBot = document.createElement("div");
    tipContainerBot.setAttribute("id", "unitipcap");
    tipContainer.appendChild(tipContainerBot);

    tipid = document.getElementById("unitip");
    tippoint = document.getElementById("unitippoint");
    tipmid = document.getElementById("unitipmid");
    tipcap = document.getElementById("unitipcap");

    document.getElementById("unitipmid").innerHTML = sTitle;
    tipid.style.display = "block";

    elewidth = document.getElementById("unitipmid").offsetWidth;
    eleheight = document.getElementById("unitip").offsetHeight;

    WinWidth = document.body.offsetWidth;
    WinHeight = (document.body.clientHeight < document.documentElement.clientHeight) ? document.body.clientHeight : document.documentElement.clientHeight;

    CapHeight = document.getElementById('unitipcap').offsetHeight;
    PointHeight = document.getElementById('unitippoint').offsetHeight;

    if (typeof pngfix == "function") { // if IE, rebuilds wraps unitippoint and unitipcap in outer div
        if (tippoint.currentStyle.backgroundImage.match(/\.png/gi)) {
            var tipP = tippoint.innerHTML;

            tippoint.id = 'unitipP'; // switch unitippoint to outer div

            tippoint.style.overflow = "hidden";
            tippoint.style.height = PointHeight + "px";
            tippoint.style.width = elewidth + "px";
            tippoint.style.position = "relative";
            tippoint.style.display = "block";

            tippoint.innerHTML = '<div id="unitippoint">' + tipP + '</div>'; // inject unitippoint

            tippointin = document.getElementById("unitippoint");  // redefine styles for unitippoint to fit filter image
            tippointin.style.width = (elewidth * 2) + "px";
            tippointin.style.height = (PointHeight * 2) + "px";
            tippointin.style.backgroundImage = tippoint.style.backgroundImage;
            tippointin.style.position = "absolute";

            tippoint.style.backgroundImage = "none";
        }
        if (tipcap.currentStyle.backgroundImage.match(/\.png/gi)) {
            var tipC = tipcap.innerHTML;

            tipcap.id = 'unitipC';

            tipcap.style.overflow = "hidden";
            tipcap.style.height = CapHeight + "px";
            tipcap.style.width = elewidth + "px";
            tipcap.style.position = "relative";
            tipcap.style.display = "block";

            tipcap.innerHTML = '<div id="unitipcap">' + tipP + '</div>';

            tipcapin = document.getElementById("unitipcap");
            tipcapin.style.height = (CapHeight * 2) + "px";
            tipcapin.style.backgroundImage = tipcap.style.backgroundImage;
            tipcapin.style.position = "absolute";

            tipcap.style.backgroundImage = "none";
        }

        pngfix(); // png fix

    }

    document.onmousemove = function(evt) { move(evt) };
}

// now, we track the mouse and make the tooltip follow
move = function(evt) {

    if (window.event) {
        x = window.event.clientX;
        y = window.event.clientY;

        if (document.documentElement.scrollLeft) tipid.style.left = (TipWidth >= WinWidth) ? ((x - offsetX - elewidth) + document.documentElement.scrollLeft) + "px" : (x + offsetX + document.documentElement.scrollLeft) + "px";
        else tipid.style.left = (TipWidth >= WinWidth) ? ((x - offsetX - elewidth) + document.body.scrollLeft) + "px" : (x + offsetX + document.body.scrollLeft) + "px";

        if (document.documentElement.scrollTop) tipid.style.top = (TipHeight >= WinHeight) ? ((y - offsetY - eleheight) + document.documentElement.scrollTop) + "px" : (y + offsetY + document.documentElement.scrollTop) + "px";
        else tipid.style.top = (TipHeight >= WinHeight) ? ((y - offsetY - eleheight) + document.body.scrollTop) + "px" : (y + offsetY + document.body.scrollTop) + "px";

    } else {
        x = evt.clientX;
        y = evt.clientY;

        tipid.style.left = (TipWidth >= WinWidth) ? ((x - offsetX - elewidth) + window.scrollX) + "px" : (x + offsetX + window.scrollX) + "px";
        tipid.style.top = (TipHeight >= WinHeight) ? ((y - offsetY - eleheight) + window.scrollY) + "px" : (y + offsetY + window.scrollY) + "px";
    }

    TipWidth = x + elewidth + 20;
    TipHeight = y + eleheight + 20;

    if (TipHeight >= WinHeight) { // rearrange the inner divs [123 to 321]
        tipid.removeChild(tippoint);
        tipid.removeChild(tipmid);
        tipid.removeChild(tipcap);
        tipid.appendChild(tipcap);
        tipid.appendChild(tipmid);
        tipid.appendChild(tippoint);
    } else {  // rearrange the inner divs [321 to 123]
        tipid.removeChild(tippoint);
        tipid.removeChild(tipmid);
        tipid.removeChild(tipcap);
        tipid.appendChild(tippoint);
        tipid.appendChild(tipmid);
        tipid.appendChild(tipcap);
    }

    if (TipHeight >= WinHeight) {

        if (document.getElementById('uniTipP')) {
            tippointin.style.left = (TipWidth >= WinWidth) ? "-" + elewidth + "px" : "0px";
            tippointin.style.top = "-" + PointHeight + "px";
        } else tippoint.style.backgroundPosition = (TipWidth >= WinWidth) ? "right bottom" : "left bottom";

        if (document.getElementById('uniTipC')) tipcapin.style.top = "-" + CapHeight + "px";
        else tipcap.style.backgroundPosition = "0 -" + CapHeight + "px";

    } else {

        if (document.getElementById('uniTipP')) {
            tippointin.style.left = (TipWidth >= WinWidth) ? "-" + elewidth + "px" : "0px";
            tippointin.style.top = "0px";
        } else tippoint.style.backgroundPosition = (TipWidth >= WinWidth) ? "right top" : "left top";

        if (document.getElementById('uniTipC')) tipcapin.style.top = "0px";
        else tipcap.style.backgroundPosition = "0 0";

    }
}

// lastly, hide the tooltip
hide = function(a, sTitle) {
    document.getElementById("unitipmid").innerHTML = "";
    document.onmousemove = '';
    document.body.removeChild(tipid);
    tipid.style.display = "none";
    if (altText == false) a.setAttribute("title", sTitle);
    else a.setAttribute("alt", sTitle);
    altText = false;
}

// add the event to the page
if (window.addEventListener) window.addEventListener("load", init, false);
if (window.attachEvent) window.attachEvent("onload", init);