var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_sample = newImage('images/common/head/btn/o/sample.gif');
		pre__1 = newImage('images/common/btn/over/1.gif');
		pre__2 = newImage('images/common/btn/over/2.gif');
		pre__3 = newImage('images/common/btn/over/3.gif');
		pre__4 = newImage('images/common/btn/over/4.gif');
		pre__5 = newImage('images/common/btn/over/5.gif');
		pre__6 = newImage('images/common/btn/over/6.gif');
		pre__7 = newImage('images/common/btn/over/7.gif');
		pre_bgm_o = newImage('images/contents/top/banner/bgm-o.gif');
		preloadFlag = true;
	}
}