img = new Array();

img[0] = "http://www.phonotope.net/parts/banner/banner_01.gif";
img[1] = "http://www.phonotope.net/parts/banner/banner_05.gif";
img[2] = "http://www.phonotope.net/parts/banner/banner_04.gif";
img[3] = "http://www.phonotope.net/parts/banner/banner_10.gif";
img[4] = "http://www.phonotope.net/parts/banner/banner_11.gif";
img[5] = "http://www.phonotope.net/parts/banner/banner_12.gif";
img[6] = "http://www.phonotope.net/parts/banner/banner_17.gif";
img[7] = "http://www.phonotope.net/parts/banner/banner_18.gif";
img[8] = "http://www.phonotope.net/parts/banner/banner_02.gif";
img[9] = "http://www.phonotope.net/parts/banner/banner_03.gif";

n = Math.floor(Math.random()*img.length);

document.write("<img src='"+img[n]+"' border='0'>");
document.write("</a>");