var disappeardelay=70; //menu disappear speed onMouseout (in miliseconds)
var enableanchorlink=1; //Enable or disable the anchor link when clicked on? (1=e, 0=d)
var hidemenu_onclick=1; //hide menu when user clicks within menu? (1=yes, 0=no)
var pixelfix=0;		   //ie6 pixel fix
var leftfix=4;
var topfix=5;
var prevParent="";

var ie5=document.all;
var ns6=document.getElementById&&!document.all;

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(pobj, obj, e, visible, hidden){
	
	if (prevParent!="" && pobj!=prevParent)
		prevParent.firstChild.className=prevParent.firstChild.className.replace(" over","");
	if (ie5||ns6)
		dropmenuobj.style.left=dropmenuobj.style.top=-500;
	if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover"){
		obj.visibility=visible;
		parenton(pobj); // Style the parent menu item through CSS class while the dropdown menu is showing.
		prevParent=pobj;
	}
	else if (e.type=="click"){
		obj.visibility=hidden;
		pobj.firstChild.className=pobj.firstChild.className.replace(" over","");
	}
}

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

function clearbrowseredge(obj, whichedge){
	var edgeoffset=0;
	if (whichedge=="rightedge"){
		var windowedge=ie5 && !window.opera? iecompattest().scrollLeft+iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15;
		dropmenuobj.contentmeasure=dropmenuobj.offsetWidth;
		if (windowedge-dropmenuobj.x < dropmenuobj.contentmeasure)
			edgeoffset=dropmenuobj.contentmeasure-obj.offsetWidth;
	}
	else{
		var windowedge=ie5 && !window.opera? iecompattest().scrollTop+iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18;
		dropmenuobj.contentmeasure=dropmenuobj.offsetHeight;
		if (windowedge-dropmenuobj.y < dropmenuobj.contentmeasure)
			edgeoffset=dropmenuobj.contentmeasure+obj.offsetHeight;
	}
	return edgeoffset;
}

function dropdownmenu(obj, e, dropmenuID){
	if (window.event) event.cancelBubble=true;
	else if (e.stopPropagation) e.stopPropagation()
	if (typeof dropmenuobj!="undefined") { //hide previous menu
		dropmenuobj.style.visibility="hidden";
	}
		clearhidemenu();
	if (ie5||ns6){
		obj.onmouseout=delayhidemenu;
		dropmenuobj=document.getElementById(dropmenuID);
		if (hidemenu_onclick) dropmenuobj.onclick=function(){dropmenuobj.style.visibility='hidden';}
			if(ie5)
				pixelfix=1;
			dropmenuobj.onmouseover=clearhidemenu;
			dropmenuobj.onmouseout=ie5? function(){ dynamichide(event)} : function(event){ dynamichide(event);}
			showhide(obj, dropmenuobj.style, e, "visible", "hidden");
			dropmenuobj.x=getposOffset(obj, "left");
			dropmenuobj.y=getposOffset(obj, "top");
			dropmenuobj.style.left=leftfix+pixelfix+dropmenuobj.x-clearbrowseredge(obj, "rightedge")+"px";
			dropmenuobj.style.top=topfix+pixelfix+dropmenuobj.y+obj.offsetHeight+"px";
			//added 1+ to fix the menu alignment in IE and Firefox.
			//original - the above line doesn't shift the menu to the top.
			//dropmenuobj.style.top=dropmenuobj.y-clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+"px"
	}
	return clickreturnvalue();
}

function clickreturnvalue(){
	if ((ie5||ns6) && !enableanchorlink) return false;
		else return true;
}

function contains_ns6(a, b) {
	while (b.parentNode)
		if ((b = b.parentNode) == a)
			return true;;
	return false;
}

function dynamichide(e){
	if (ie5&&!dropmenuobj.contains(e.toElement))
		delayhidemenu();
	else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget)) {
		delayhidemenu();
	}
}

function delayhidemenu(){
	delayhide=setTimeout("dropmenuobj.style.visibility='hidden';prevParent.firstChild.className=prevParent.firstChild.className.replace(' over', '');",disappeardelay);
	// hide the menu and unstyle the parent item by removing the CSS class name.
}

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

function parenton(obj){
	obj.firstChild.className+=" over";
}