function fnLoadImage(varImagePath) {
	var varImage = new Image();
	varImage.src = varImagePath;
}

function fnPreloadImages() {
	var varImage = null;
	if (document.images) {
		fnLoadImage("/library/images/button_alt_children.gif");
		fnLoadImage("/library/images/button_alt_no_children.gif");
	}
}

function fnChangeClass(varButton, varClassName) {
	varButton.className = varClassName;
}

fnPreloadImages();