img = new Array();
img[0] = "img/topphoto/0.jpg";
img[1] = "img/topphoto/1.jpg";
img[2] = "img/topphoto/2.jpg";
img[3] = "img/topphoto/3.jpg";
img[4] = "img/topphoto/4.jpg";
img[5] = "img/topphoto/5.jpg";
img[6] = "img/topphoto/6.jpg";
img[7] = "img/topphoto/7.jpg";
img[8] = "img/topphoto/8.jpg";
img[9] = "img/topphoto/9.jpg";
img[10] = "img/topphoto/10.jpg";
img[11] = "img/topphoto/11.jpg";
img[12] = "img/topphoto/12.jpg";
img[13] = "img/topphoto/13.jpg";
img[14] = "img/topphoto/14.jpg";
img[15] = "img/topphoto/15.jpg";
img[16] = "img/topphoto/16.jpg";
img[17] = "img/topphoto/17.jpg";
img[18] = "img/topphoto/18.jpg";
img[19] = "img/topphoto/19.jpg";

function topphoto() {
	n = Math.floor(Math.random()*img.length);
	document.write("<img id='topphoto' name='topphoto'  src='"+img[n]+"' width='316' height='200' alt='トップページの写真' />");
}