	<!--
	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_findObj(n, d) { //v3.0
	  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); 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 newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
		}
	}
	
	var MM_preloadFlag = false;
	function preloadImages() {
		if (document.images) {
			home_over = newImage("/i/header/nav_home/nav_exhibitsshows2.gif");
			products_over = newImage("/i/header/nav_home/nav_schedules2.gif");
			aboutus_over = newImage("/i/header/nav_home/nav_ourorg2.gif");
			education_over = newImage("/i/header/nav_home/nav_planvisit2.gif");
			careers_over = newImage("/i/header/nav_home/nav_visitorinfo2.gif");
			resources_over = newImage("/i/header/nav_home/nav_educators2.gif");
			MM_preloadFlag = true;
		}
	}

	//-->