img = new Array();
img[0] = "http://www.jia-kanto.org/online/images/new_toppage/month03a.jpg";
img[1] = "http://www.jia-kanto.org/online/images/new_toppage/month03b.jpg";


function setBanner(){
	amount = img.length;
	No = Math.floor(Math.random()*amount);
	document.write("<img src='" + img[No] + "' border='0'>");
}