// Top 10: JavaScript
//===========================================================================
// Rich HTML Balloon Tooltip: http://www.dynamicdrive.com/dynamicindex5/balloontooltip.htm
// Created: September 10th 2006
//===========================================================================
var disappeardelay = 150 // tooltip disappear delay (in miliseconds)
var verticaloffset = 0 // vertical offset of tooltip from anchor link, if any
var enablearrowhead = 1 // 0 or 1, to disable or enable the arrow image
var arrowheadimg = ["images/arrowdown.gif", "images/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 + 10 : 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 balloon 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() { 
    delayhidemenu = 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
        }// end if
        //===================================================================
    }// end for
} // end function
//==============================================================================

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

}