var image = new Array();
var href = new Array();

href[0] = "properties/listings/list.php?action=view_record&cs_id=06-137681";
image[0] = "http://www.condosource.com/images/featured_condo.jpg";

href[1] = "properties/listings/list.php?action=view_record&cs_id=06-138499";
image[1] = "http://www.condosource.com/images/featured_loft.jpg";

function random_anchor_tag (prefix_path, href, image) {
  var r = Math.round(Math.random()*(image.length - 1));
 
  return ('<a href="' + prefix_path + href[r] + '"><img src="' + image[r] + '" /></a>');
}