var imglist2 = new Array("ran/a00.jpg","ran/a01.jpg","ran/a02.jpg","ran/a03.jpg","ran/a04.jpg","ran/a05.jpg","ran/a06.jpg","ran/a07.jpg","ran/a08.jpg","ran/a09.jpg","ran/a10.jpg","ran/a11.jpg","ran/a12.jpg","ran/a13.jpg" );
var selectnum = Math.floor((Math.random() * 100)) % imglist2.length;
var output = "<img src=" + imglist2[selectnum] + ">";
document.write(output);