var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		aboutbtn_01_over = newImage("images/aboutbtn_01-over.gif");
		aboutbtn_01_down = newImage("images/aboutbtn_01-down.gif");
		contactbtn_01_over = newImage("images/contactbtn_01-over.gif");
		contactbtn_01_down = newImage("images/contactbtn_01-down.gif");
		homebtn_01_over = newImage("images/homebtn_01-over.gif");
		homebtn_01_down = newImage("images/homebtn_01-down.gif");
		servicesbtn_01_over = newImage("images/servicesbtn_01-over.gif");
		servicesbtn_01_down = newImage("images/servicesbtn_01-down.gif");
		preloadFlag = true;
	}
}