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

var disappeardelay = 250  //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