var subWindow;

function displayImage(image, description, height, width) {
	if (subWindow && !subWindow.closed) subWindow.close();

	height = height + 70;
	width = width + 20;

	subWindow = window.open("image.asp?image=" + image + "&description=" + description, "image", "height=" + height + ",width=" + width);
}

function displayLecture(document) {
	if (subWindow && !subWindow.closed) subWindow.close();

	subWindow = window.open(document, "lecture", "height=240,width=320");
}