var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_index_over_08 = newImage('imageswww/index_over_08.gif');
		pre_index_over_09 = newImage('imageswww/index_over_09.gif');
		pre_index_over_10 = newImage('imageswww/index_over_10.gif');
		pre_index_over_11 = newImage('imageswww/index_over_11.gif');
		pre_index_over_12 = newImage('imageswww/index_over_12.gif');
		preloadFlag = true;
	}
}