var contentArea = "";
var currentNavItem;

function hiLite(n) {
	navItem = eval("nav" + n);
	navItem.src = "../images/portfolio/nav_item_on.gif";
}

function unLite(n) {
	navItem = eval("nav" + n);
	if (navItem != currentNavItem) { navItem.src = "../images/portfolio/nav_item.gif" }
}

function swap(n) {
	if (document.all) { contentArea = document.all.portfolioBlock }
	else { contentArea = document.getElementById('portfolioBlock') }
	
	contentArea.innerHTML = eval("contentItem" + n);
	
	currentNavItem.src = "../images/portfolio/nav_item.gif";
	
	navItem = eval("nav" + n);
	navItem.src = "../images/portfolio/nav_item_on.gif";
	currentNavItem = navItem;
}