function navHover(el, src) {
	// Swap out an image, unless it is the current page
	if (el.current != true) {
		swap(el, src);
	}
}

function navInit(id) {
	// Initialize the navigation to the current page.
	if ($("tab-" + id)) {
		$("tab-" + id).className = "active";
	}
}

function clearColumns() {
	$('container').className = '';
}

function swap(el, src) {
	el.src = src;
}

function $(id) {
	return document.getElementById(id);
}