function random_text()
{};
var random_text = new random_text();

var number = 0;

random_text[number++] = ('<tr><td><a href="http://banners.penthouse.com/go/page/ph_shay_landing_01a?pid=g1057272-pct" target="_blank"><img src="../../../bn/penthouse/18667_594x73.jpg" alt="Exclusive Penthouse Pet Pictorials &amp; Videos" width="594" height="73" border="0" /></a></td></tr>')
random_text[number++] = ('<tr><td><a href="http://banners.penthouse.com/go/page/ph_shay_landing_01a?pid=g1057272-pct" target="_blank"><img src="../../../bn/penthouse/18850_594x73.jpg" alt="Exclusive Penthouse Pet Pictorials &amp; Videos" width="594" height="73" border="0" /></a></td></tr>')

var random_number = Math.floor(Math.random() * number);

document.write(random_text[random_number]);