img = new Array();
img[0] = "31.jpg";
img[1] = "02.jpg";
img[2] = "04.jpg";
img[3] = "05.jpg";
img[4] = "06.jpg";
img[5] = "08.jpg";
img[6] = "09.jpg";
img[7] = "11.jpg";
img[8] = "13.jpg";
img[9] = "14.jpg";
img[10] = "16.jpg";
img[11] = "17.jpg";
img[12] = "18.jpg";
img[13] = "20.jpg";
img[14] = "21.jpg";
img[15] = "23.jpg";
img[16] = "24.jpg";
img[17] = "25.jpg";
img[18] = "26.jpg";
img[19] = "27.jpg";
img[20] = "28.jpg";
img[21] = "29.jpg";
img[22] = "30.jpg";
img[23] = "32.jpg";
img[24] = "33.jpg";
img[25] = "01.jpg";
n = Math.floor(Math.random()*img.length);
document.write("<img src='slide_images/"+img[n]+"' width='518' height='376' border='0'>");
//旧ブラウザ用静止画像（ランダム表示）