var disappeardelay = 50;
var verticaloffset = 0;
var enablearrowhead = 1;
var arrowheadimg = ["/images/explore/arrow_down.gif", "/images/explore/arrow_up.gif"];
var arrowheadheight = 12;
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.display="block";
}

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)
			edgeoffsety=dropmenuobj.contentmeasure+obj.offsetHeight+(verticaloffset*2);
		return edgeoffsety;
	}
}

function displayballoontip(obj, e) {
	if (window.event)
		event.cancelBubble=true;
	else if (e.stopPropagation)
		e.stopPropagation();
	if (typeof dropmenuobj!="undefined")
		dropmenuobj.style.display="none";
	clearhidemenu();
	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") - 320;
	dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight - 170;
	dropmenuobj.style.left=dropmenuobj.style.left +"px";
	dropmenuobj.style.top=dropmenuobj.style.top +"px";
	if (enablearrowhead)
		displaytiparrow();
}

function displaytiparrow() {
	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;
	tiparrow.style.left=(edgeoffsetx!=0)? parseInt(dropmenuobj.style.left)+dropmenuobj.offsetWidth-tiparrow.offsetWidth-10+"px" : parseInt(dropmenuobj.style.left)+5+"px";
	tiparrow.style.top=(edgeoffsety!=0)? parseInt(dropmenuobj.style.top)+dropmenuobj.offsetHeight-tiparrow.offsetHeight-ieshadowwidth+arrowheadheight+"px" : parseInt(dropmenuobj.style.top)-arrowheadheight+"px";
	tiparrow.style.display="block";
}

function delayhidemenu() {
	delayhide=setTimeout("dropmenuobj.style.display='none'; dropmenuobj.style.left=0; if (enablearrowhead) tiparrow.style.display='block'",disappeardelay);
}

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

function reltoelement(linkobj) {
	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])) {
			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;