var preloadFlag = false;

function preloadImages() {
	if (document.images) {
		site_map_over = newImage('../../img/site_map-over.gif');
		link_over = newImage('../../img/link-over.gif');
		english_over = newImage('../../img/english-over.gif');

		main_button01_over = newImage('../../img/main_button01-over.gif');
		main_button02_over = newImage('../../img/main_button02-over.gif');
		main_button03_over = newImage('../../img/main_button03-over.gif');
		main_button04_over = newImage('../../img/main_button04-over.gif');
		main_button05_over = newImage('../../img/main_button05-over.gif');
		
		sub_button01_over = newImage('../img/sub_button01-over.gif');
		sub_button02_over = newImage('../img/sub_button02-over.gif');
		sub_button03_over = newImage('../img/sub_button03-over.gif');
		sub_button04_over = newImage('../img/sub_button04-over.gif');
		sub_button05_over = newImage('../img/sub_button05-over.gif');
		sub_button06_over = newImage('../img/sub_button06-over.gif');
		sub_button07_over = newImage('../img/sub_button07-over.gif');
		preloadFlag = true;
	}
}