var imglist = new Array("ran2/b00.jpg","ran2/b01.jpg","ran2/b02.jpg","ran2/b03.jpg","ran2/b04.jpg","ran2/b05.jpg","ran2/b06.jpg","ran2/b07.jpg","ran2/b08.jpg","ran2/b09.jpg","ran2/b10.jpg","ran2/b11.jpg","ran2/b12.jpg","ran2/b13.jpg" );
var selectnum = Math.floor((Math.random() * 100)) % imglist.length;
var output = "<img src=" + imglist[selectnum] + ">";
document.write(output);