var isDHTML = 0;
var isLayers = 0;
var isAll = 0;
var isID = 0;

if (document.getElementById) {isID = 1; isDHTML = 1;}
else {
if (document.all) {isAll = 1; isDHTML = 1;}
else {
browserVersion = parseInt(navigator.appVersion);
if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion == 4)) {isLayers = 1; isDHTML = 1;}
};};

function findDOM(objectID,withStyle) {
	if (withStyle == 1) {
		if (isID) { return (document.getElementById(objectID).style) ; }
		else { 
			if (isAll) { return (document.all[objectID].style); }
		else {
			if (isLayers) { return (document.layers[objectID]); }
		};}
	}
	else {
		if (isID) { return (document.getElementById(objectID)) ; }
		else { 
			if (isAll) { return (document.all[objectID]); }
		else {
			if (isLayers) { return (document.layers[objectID]); }
		};}
	}
}

var menuTop = 45;
var menuLeft = 400;

var domSMenu = null;
var oldDomSMenu = null;
var t = 0;
var lDelay = 3;
var lCount = 0;
var pause = 100;

function popMenu(menuNum){
	if (isDHTML) {
///// Sets the previous menu's visibility to hidden
		t = 2;
		if (oldDomSMenu) {
			oldDomSMenu.visibility = 'hidden';
			oldDomSMenu.zIndex = '0';
			t = 2;
			lCount = 0;
		}

///// Defines the DOMs	of the menu objects
		var idMenu = 'menuHead';
		var domMenu = findDOM(idMenu,0);

		var idMenuOpt = 'menuHead' + menuNum;
		var domMenuOpt = findDOM(idMenuOpt,0);

		var idSMenu = 'menu' + menuNum;
		var domSMenu = findDOM(idSMenu,1);

///// Defines the positions of the sub-menus
	if (isID || isAll) {
				var menuLeft = (domMenu.offsetLeft) + (domMenuOpt.offsetLeft) + 5;
				var menuTop = (domMenu.offsetTop) + (domMenu.offsetHeight) + 5;
			}
		if (isLayers) {
				var menuLeft = document.layers[idMenu].layers[idMenuOpt].pageX - 5;
				var menuTop = domMenu.pageY + domMenu.clip.height - 5;
		}

///// Positions and shows the menu
		if (oldDomSMenu != domSMenu) {
			domSMenu.left = menuLeft;
			domSMenu.top = menuTop;
			domSMenu.visibility = 'visible';
			domSMenu.zIndex = '100';
			oldDomSMenu = domSMenu;
		}

///// Resets oldDom if it is the same as the current DOM
		else { oldDomSMenu = null; }
	}

////// Returns a 'null' value for non-DHTML Browsers
	else { return null; }
}

function delayHide() {
///// Checks to see if there is a menu showing and whether
///// the global variable 't' has been set to 0
	if ((oldDomSMenu) && (t == 0)) {

///// Hides the old menu, resets menu conditions,
///// and stops the function running
		oldDomSMenu.visibility = 'hidden';
		oldDomSMenu.zIndex = '0';
		oldDomSMenu = null;
		lCount = 0;
		return false;
	};

///// Interupts the function if another menu is opened
	if (t == 2) { lCount = 0; return false; }

///// Repeats the function adding 1 to lCount each time until
///// lCount is equal to lDelay and then sets 't' to 0 so that
///// the menu will hide when it runs again
	if (t == 1) {
		lCount = lCount + 1;
		if (lDelay <= lCount) { t = 0; }
		if (lDelay >= lCount) { setTimeout('delayHide(' + t + ')',pause); }
	};
}