/***********************************************
* AnyLink CSS Menu script- © Dynamic Drive DHTML code library (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
*
* This code has been modified to work unobtrusively
* Usage:
* 1. add the anylink.css declarations to your css file
* 2. set navigation variable to the ID of the element containing the links which will have the a dropdown
* 2. set link class names equal to dropdown html id names
***********************************************/

var disappeardelay = 250;  // menu disappear speed onMouseout (in miliseconds)
var enableanchorlink = 0;  // 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 navigation = 'header'; // ID of element containing navigation links

// No further editing needed

window.onload = function()
{
   var nav_links = document.getElementById(navigation).getElementsByTagName('a');

   for(var i = 0;i < nav_links.length;i++) { // iterate through nav links

      if(nav_links[i].className == null || nav_links[i].className == '') { continue; }

      nav_links[i].onmouseover = function(event)
      {
         if(navigator.appName == 'Microsoft Internet Explorer') { // IE concession
            var event = window.event;
         }

         dropdownmenu(this,event,this.className);
      }
   }
}


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(obj,e,visible,hidden)
{
	if(ie5 || ns6) {
		dropmenuobj.style.left = dropmenuobj.style.top = -500;
	}
	if(e.type == "click" && obj.visibility == hidden || e.type == "mouseover") {
		obj.visibility = visible;
	} else if(e.type == "click") {
		obj.visibility = hidden;
	}
}

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 topedge = ie5 && !window.opera ? iecompattest().scrollTop : window.pageYOffset;
		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) { //move up?
			edgeoffset = dropmenuobj.contentmeasure + obj.offsetHeight;
			if ((dropmenuobj.y - topedge) < dropmenuobj.contentmeasure) { //up no good either?
				edgeoffset = dropmenuobj.y + obj.offsetHeight - topedge;
			}
		}
	}
	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'; }
		}
		dropmenuobj.onmouseover = clearhidemenu;
		dropmenuobj.onmouseout = ie5 ? function(){ dynamichide(event)} : function(event){ dynamichide(event)};
		showhide(dropmenuobj.style,e,"visible","hidden");
		dropmenuobj.x = getposOffset(obj,"left");
		dropmenuobj.y = getposOffset(obj,"top");
		dropmenuobj.style.left = dropmenuobj.x - clearbrowseredge(obj,"rightedge") + "px";
		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'",disappeardelay);
}

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