function showMenu (menuid) {

		hideMenu('all');		
		theMenu = returnObjById (menuid);
		theMenu.style.visibility = 'visible';
	}

	function hideMenu (menuid) {

		if (menuid == 'all') {
			hideMenu('menuAbout');
			hideMenu('menuFacilities');
			hideMenu('menuCollection');
			hideMenu('menuEducation');
			hideMenu('menuVolunteers');
			hideMenu('menuMuseums');
			hideMenu('menuWhatson');
		}
		else {
			var theMenu;
			theMenu = returnObjById (menuid);
			theMenu.style.visibility = 'hidden';
		}
	}
	function nullMenu () {
		//do nothing
	}

	function returnObjById( id )
	//	Simple cross-browser compatible function to return object by ID (IMPORTANT: requires ID attribute to be defined)
	{
		if (document.getElementById)
			var returnVar = document.getElementById(id);
		else if (document.all)
			var returnVar = document.all[id];
		else if (document.layers)
			var returnVar = document.layers[id];
		return returnVar;
	}

/*
	Dreamweaver functions 
*/
	function MM_swapImgRestore() { //v3.0
	  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
	}
	
	function MM_preloadImages() { //v3.0
	  var d=document; 
	  if(d.images){ 
	  	if(!d.MM_p) d.MM_p=new Array();
		var i, j=d.MM_p.length, a=MM_preloadImages.arguments; 
		for(i=0; i<a.length; i++)
			if (a[i].indexOf("#")!=0){ 
				d.MM_p[j]=new Image; 
				d.MM_p[j++].src=a[i];
			}
		}
	}
	
	function MM_findObj(n, d) { //v4.01
	  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
	  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
	  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
	  if(!x && d.getElementById) x=d.getElementById(n); return x;
	}
	
	function MM_swapImage() { //v3.0
	  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
	   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
	}

	function MM_callJS(jsStr) { //v2.0
	  	return eval(jsStr)
	}

	function MM_goToURL() { //v3.0
	  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
	  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
	}

	function MM_openBrWindow(theURL,winName,features) { //v2.0
  		window.open(theURL,winName,features);
	}