//Rich HTML Balloon Tooltip: http://www.dynamicdrive.com/dynamicindex5/balloontooltip.htm
//Created: September 10th, 2006

var disappeardelay=1000;  //tooltip disappear delay (in miliseconds)
var verticaloffset=0; //vertical offset of tooltip from anchor link, if any
var enablearrowhead=0; //0 or 1, to disable or enable the arrow image
var arrowheadimg=["arrowdown.gif", "arrowup.gif"]; //path to down and up arrow images
var arrowheadheight=11; //height of arrow image (amount to reveal)

/////No further editting needed
var ie=document.all;
var ns6=document.getElementById&&!document.all;
verticaloffset=(enablearrowhead)? verticaloffset+arrowheadheight : verticaloffset;
	    
function getposOffset(what, offsettype){
    var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
    var parentEl=what.offsetParent;
    while (parentEl!=null){
        totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
        parentEl=parentEl.offsetParent;
    }
    return totaloffset;
}

function showhide(obj, e){
    dropmenuobj.style.left=dropmenuobj.style.top="-500px";
    if (e.type=="mouseover")
        obj.visibility="visible";
}

function iecompattest(){
    return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body;
}

function clearbrowseredge(obj, whichedge){
if (whichedge=="rightedge"){
    edgeoffsetx=0;
    var windowedge=ie && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15;
    dropmenuobj.contentmeasure=dropmenuobj.offsetWidth;
    if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure)
        edgeoffsetx=dropmenuobj.contentmeasure-obj.offsetWidth;
    return edgeoffsetx;
}
else{
    edgeoffsety=0;
    var topedge=ie && !window.opera? iecompattest().scrollTop : window.pageYOffset;
    var windowedge=ie && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18;
    dropmenuobj.contentmeasure=dropmenuobj.offsetHeight;
    if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure) //move up?
        edgeoffsety=dropmenuobj.contentmeasure+obj.offsetHeight+(verticaloffset*2);
    return edgeoffsety;
    }
}

function displayballoontip(obj, e){ //main ballooon tooltip function
    if (window.event) event.cancelBubble=true;
    else if (e.stopPropagation) e.stopPropagation();
    if (typeof dropmenuobj!="undefined") //hide previous tooltip?
    dropmenuobj.style.visibility="hidden";
    clearhidemenu();
    //obj.onmouseout=delayhidemenu
    dropmenuobj=document.getElementById(obj.getAttribute("rel"));
    showhide(dropmenuobj.style, e);
    dropmenuobj.x=getposOffset(obj, "left");
    dropmenuobj.y=getposOffset(obj, "top")+verticaloffset;
    dropmenuobj.style.left=dropmenuobj.x-clearbrowseredge(obj, "rightedge")+"px";
    dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+"px";
    if (enablearrowhead)
    displaytiparrow();
}

function displaytiparrow(){ //function to display optional arrow image associated with tooltip
    tiparrow=document.getElementById("arrowhead");
    tiparrow.src=(edgeoffsety!=0)? arrowheadimg[0] : arrowheadimg[1];
    var ieshadowwidth=(dropmenuobj.filters && dropmenuobj.filters[0])? dropmenuobj.filters[0].Strength-1 : 0;
    //modify "left" value depending on whether there's no room on right edge of browser to display it, respectively
    tiparrow.style.left=(edgeoffsetx!=0)? parseInt(dropmenuobj.style.left)+dropmenuobj.offsetWidth-tiparrow.offsetWidth-10+"px" : parseInt(dropmenuobj.style.left)+5+"px";
    //modify "top" value depending on whether there's no room on right edge of browser to display it, respectively
    tiparrow.style.top=(edgeoffsety!=0)? parseInt(dropmenuobj.style.top)+dropmenuobj.offsetHeight-tiparrow.offsetHeight-ieshadowwidth+arrowheadheight+"px" : parseInt(dropmenuobj.style.top)-arrowheadheight+"px";
    tiparrow.style.visibility="visible";
}

function delayhidemenu(){
    delayhide=setTimeout("dropmenuobj.style.visibility='hidden'; dropmenuobj.style.left=0; if (enablearrowhead) tiparrow.style.visibility='hidden'",disappeardelay);
}

function clearhidemenu(){
    if (typeof delayhide!="undefined")
    clearTimeout(delayhide);
}

function reltoelement(linkobj){ //tests if a link has "rel" defined and it's the ID of an element on page
var relvalue=linkobj.getAttribute("rel")
    return (relvalue!=null && relvalue!="" && document.getElementById(relvalue)!=null && document.getElementById(relvalue).className=="balloonstyle")? true : false;
}

function initalizetooltip(){
    var all_links=document.getElementsByTagName("a");
    if (enablearrowhead){
        tiparrow=document.createElement("img");
        tiparrow.setAttribute("src", arrowheadimg[0]);
        tiparrow.setAttribute("id", "arrowhead");
        document.body.appendChild(tiparrow);
    }
    for (var i=0; i<all_links.length; i++){
        if (reltoelement(all_links[i])){ 
            //if link has "rel" defined and it's the ID of an element on page
            all_links[i].onmouseover=function(e){var evtobj=window.event? window.event : e; displayballoontip(this, evtobj);}
            all_links[i].onmouseout=delayhidemenu;
        }
    }
}

if (window.addEventListener)
    window.addEventListener("load", initalizetooltip, false);
else if (window.attachEvent)
    window.attachEvent("onload", initalizetooltip);
else if (document.getElementById)
    window.onload=initalizetooltip;