var imglist = new Array(
 "./img2/2164_01.jpg",
 "./img2/2172_01.jpg",
 "./img2/3800_01.jpg",
 "./img2/5200_01.jpg",
 "./img2/60-1.gif",
 "./img2/776px-Kaminarimon1500.jpg",
 "./img2/benten009.jpg",
 "./img2/fall_2_b.jpg",
 "./img2/fl016-03.jpg",
 "./img2/image48.jpg",
 "./img2/kamakura009.jpg",
 "./img2/nijyubashi001.jpg",
 "./img2/oowakudani1.gif",
 "./img2/PC140001r.JPG",
 "./img2/r_bridge_005_640_480.jpg",
 "./img2/r_bridge_014_640_480.jpg",
 "./img2/sensouji030.jpg",
 "./img2/sensouji034.jpg",
 "./img2/ue0056m.jpg",
 "./img2/ue0061m.jpg",
 "./img2/yam0052-012.jpg" );
var selectnum = Math.floor((Math.random() * 100)) % imglist.length;
var output = "<img src=" + imglist[selectnum] + " width='200' />";
document.write(output);