var imageWidth = 130;
var imageHeight = 90;
var delay = 0;
var doneAction = "wellDone();";

var matchingPairs = new Array(
"bulb.gif", "txt_bulb.gif",
"socket.gif", "txt_socket.gif",
"photo.gif", "txt_photo.gif",
"plug.gif", "txt_plug.gif",
"shelves.gif", "txt_shelves.gif",
"batteries.gif", "txt_batteries.gif",
"calculator.gif", "txt_calculator.gif",
"torch.gif", "txt_torch.gif",
"cupboard.gif", "txt_cupboard.gif",
"dishwasher.gif", "txt_dishwasher.gif",
"microwave.gif", "txt_microwave.gif",
"pan.gif", "txt_pan.gif",
"cooker.gif", "txt_cooker.gif",
"sink.gif", "txt_sink.gif",
"stools.gif", "txt_stools.gif",
"tap.gif", "txt_tap.gif"
);