img = new Array();
img[0] = "./images/index/main_image01.jpg";
img[1] = "./images/index/main_image02.jpg";
img[2] = "./images/index/main_image03.jpg";

function setBanner(){
	amount = img.length;
	No = Math.floor(Math.random()*amount);
	document.write("<img src='" + img[No] + "' alt='ゼロからスタートしてプロになる　クルマのことがもっと好きになる毎日に。' width='950' height='260' />");
}