function showItem(item_num_string) {
	var itemFileName = item_num_string + ".html";
	new Ajax.Updater('item', itemFileName, { method: 'get' });
	Effect.toggle('slugs', 'appear');
	Effect.toggle('item', 'appear');
}

function showSlugs() {
	Effect.toggle('item', 'appear');
	Effect.toggle('slugs', 'appear');
}

function showTruckViewer() {
	new Ajax.Updater('enviro_Truck_viewer', 'enviro_viewer.html', { method: 'get'});
	// new Effect.BlindDown('item_content');
	// new Effect.Blindup('enviro_Truck_viewer', { queue: 'end' });
	Effect.toggle('item_content', 'blind');
	Effect.toggle('enviro_Truck_viewer', 'blind', { queue: 'end' } );
}

function removeTruckViewer() {
	// new Effect.BlindDown('enviro_Truck_viewer');
	// new Effect.BlindUp('item_content', { queue: 'end' });
	Effect.toggle('enviro_Truck_viewer', 'blind');
	Effect.toggle('item_content', 'blind', { queue: 'end' });
}

function showPopup(popup_num_string) {
	var popupName = "popup" + popup_num_string;
	// var popupDivName = "div#" + popupName;
	new Effect.Appear(popupName);
	// Nifty(popupDivName, "medium");
}

function closePopup(popup_num_string) {
	var popupName = "popup" + popup_num_string;
	new Effect.Fade(popupName);
}