function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		explore_over = newImage("images/explore-over.gif");
		inaction_over = newImage("images/inaction-over.gif");
		encyclopedia_over = newImage("images/encyclopedia-over.gif");
		line_thumbnail_over = newImage("images/line_thumbnail-over.gif");
		line_slideshow_over = newImage("images/line_slideshow-over.gif");
		create_over = newImage("images/create-over.gif");
		find_over = newImage("images/find-over.gif");
		watch_over = newImage("images/watch-over.gif");
		line_intro_over = newImage("images/line_intro-over.gif");
		line_type_over = newImage("images/line_type-over.gif");
		line_express_over = newImage("images/line_express-over.gif");
		line_implied_over = newImage("images/line_implied-over.gif");
		line_texture_over = newImage("images/line_texture-over.gif");
		line_contour_over = newImage("images/line_contour-over.gif");
		clear_over = newImage("images/tk_clear.jpg");
		save_over = newImage("images/tk_save.jpg");
		preloadFlag = true;
	}
}

window.onload = preloadImages;

function openWindow(theURL,winName,features)
	{
	window.open(theURL,winName,features);
	}
	
function closeWindow()
	{
	window.close();
	}