var preloadFlag = false;
	function preloadImages() {
		if (document.images) {
		over_bottun_01 = newImage(/*URL*/'index_sub/bottun_01_f2.gif');
		over_bottun_2 = newImage(/*URL*/'index_sub/bottun_02_f2.gif');
	preloadFlag = true;
	}
}