function random(){

url = new Array(7);
img = new Array(url.length);

i = Math.floor(Math.random( ) * url.length);

url[0]="#";
img[0]="/images2/banner_oden01.jpg";

url[1]="#";
img[1]="/images2/banner_oden02.jpg";

url[2]="#";
img[2]="/images2/banner_oden03.jpg";

url[3]="#";
img[3]="/images2/banner_oden04.jpg";

url[4]="#";
img[4]="/images2/banner_oden05.jpg";

url[5]="#";
img[5]="/images2/banner_oden06.jpg";

url[6]="#";
img[6]="/images2/banner_oden07.jpg";

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

}