var preloadFlag = false;	// global preload flag
function preloadImages() {
	if (document.images) {
		rpa_home_09_over = newImage("images/rpa_home_09-over.jpg");
		rpa_home_10_over = newImage("images/rpa_home_10-over.jpg");
		rpa_home_11_over = newImage("images/rpa_home_11-over.jpg");
		rpa_home_12_over = newImage("images/rpa_home_12-over.jpg");
		rpa_home_13_over = newImage("images/rpa_home_13-over.jpg");
		rpa_home_14_over = newImage("images/rpa_home_14-over.jpg");
		rpa_home_15_over = newImage("images/rpa_home_15-over.jpg");
		rpa_home_16_over = newImage("images/rpa_home_16-over.jpg");
		rpa_home_27_over = newImage("images/rpa_home_27-over.jpg");
		rpa_home_28_over = newImage("images/rpa_home_28-over.jpg");
		rpa_home_29_over = newImage("images/rpa_home_29-over.jpg");
		preloadFlag = true;
	}
}