img = new Array();
img[0] = "http://www.officefuji.co.jp/contents/images/top_1.png";
img[1] = "http://www.officefuji.co.jp/contents/images/top_2.png";
img[2] = "http://www.officefuji.co.jp/contents/images/top_3.png";
img[3] = "http://www.officefuji.co.jp/contents/images/top_4.png";

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