// JavaScript Document
var popups = new Array("video","images","interactive","contact");
function showNav(index) {
	var thisPopup = document.getElementById('nav_'+popups[index]);
	if(thisPopup!=null){
		thisPopup.style.visibility = 'visible';
	}
}
function hideNav(index) {
	var thisPopup = document.getElementById('nav_'+popups[index]);
	if(thisPopup!=null){
		thisPopup.style.visibility = 'hidden';
	}
}