function render_ad (ad_position, width, height) {
  var rand = (Math.random().toString()).substring(2,11);

  var pageid = (Math.random().toString()).substring(2,11);
  var ad = ad_position != '' ? '/AAMSZ='+ad_position : '';
  var ad_call = 'http://atl.whitepages.com/hserver/acc_random=' + rand + '/pageid=' + pageid + ad + '/site=PN.USPS';

  document.write('<iframe src="' + ad_call + '" NORESIZE SCROLLING="NO" HSPACE="0" VSPACE="0" FRAMEBORDER="0" MARGINHEIGHT="0" MARGINWIDTH="0" WIDTH=' + width + ' HEIGHT=' + height + ' allowTransparency="true"></iframe>');
}