img = new Array();
img[0] = "/common/img/credo01.jpg";
img[1] = "/common/img/credo02.jpg";
img[2] = "/common/img/credo03.jpg";
img[3] = "/common/img/credo04.jpg";
img[4] = "/common/img/credo05.jpg";
img[5] = "/common/img/credo06.jpg";
img[6] = "/common/img/credo07.jpg";
img[7] = "/common/img/credo08.jpg";
img[8] = "/common/img/credo09.jpg";
img[9] = "/common/img/credo10.jpg";
n = Math.floor(Math.random()*img.length);
document.write("<img src='"+img[n]+"' />");