function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		Image1_over = newImage("parts/business_bot_tyo_on.gif");
		Image2_over = newImage("parts/business_bot_osa_on.gif");
		Image3_over = newImage("parts/business_bot_ngo_on.gif");
		Image4_over = newImage("parts/business_bot_fuk_on.gif");
		Image5_over = newImage("parts/business_bot_spk_on.gif");
		Image6_over = newImage("parts/business_bot_tyo_on.gif");
		Image7_over = newImage("parts/business_bot_osa_on.gif");
		Image8_over = newImage("parts/business_bot_ngo_on.gif");
		Image9_over = newImage("parts/business_bot_fuk_on.gif");
		Image10_over = newImage("parts/business_bot_kaku_on.gif");
	

		preloadFlag = true;
	}
}