var cat_ad = 0;
  
  var cat_ad_image_srcs = new Array();
  cat_ad_image_srcs[0] = "http://www.1800petmeds.com/images/products/large/104322_160.jpg";
  cat_ad_image_srcs[1] = "http://www.1800petmeds.com/images/products/large/104332_160.jpg";
  cat_ad_image_srcs[2] = "http://www.1800petmeds.com/images/products/large/104322_160.jpg";
  cat_ad_image_srcs[3] = "http://www.1800petmeds.com/images/products/large/104332_160.jpg";
  cat_ad_image_srcs[4] = "http://www.1800petmeds.com/images/products/large/104322_160.jpg";
  cat_ad_image_srcs[5] = "http://www.1800petmeds.com/images/products/large/104332_160.jpg";
  
  var cat_ad_urls = new Array();
  cat_ad_urls[0] = "http://click.linksynergy.com/fs-bin/click?id=kcowBcROGIM&offerid=56753.10032&type=2&subid=0";
  cat_ad_urls[1] = "http://click.linksynergy.com/fs-bin/click?id=kcowBcROGIM&offerid=56753.10033&type=2&subid=0";
  cat_ad_urls[2] = "http://click.linksynergy.com/fs-bin/click?id=kcowBcROGIM&offerid=56753.10432&type=2&subid=0";
  cat_ad_urls[3] = "http://click.linksynergy.com/fs-bin/click?id=kcowBcROGIM&offerid=56753.10433&type=2&subid=0";
  cat_ad_urls[4] = "http://click.linksynergy.com/fs-bin/click?id=kcowBcROGIM&offerid=56753.104322&type=2&subid=0";
  cat_ad_urls[5] = "http://click.linksynergy.com/fs-bin/click?id=kcowBcROGIM&offerid=56753.104332&type=2&subid=0";
  
  var cat_ad_tracking_srcs = new Array();
  cat_ad_tracking_srcs[0] = "http://ad.linksynergy.com/fs-bin/show?id=kcowBcROGIM&bids=56753.10032&type=2&subid=0";
  cat_ad_tracking_srcs[1] = "http://ad.linksynergy.com/fs-bin/show?id=kcowBcROGIM&bids=56753.10033&type=2&subid=0";
  cat_ad_tracking_srcs[2] = "http://ad.linksynergy.com/fs-bin/show?id=kcowBcROGIM&bids=56753.10432&type=2&subid=0";
  cat_ad_tracking_srcs[3] = "http://ad.linksynergy.com/fs-bin/show?id=kcowBcROGIM&bids=56753.10433&type=2&subid=0";
  cat_ad_tracking_srcs[4] = "http://ad.linksynergy.com/fs-bin/show?id=kcowBcROGIM&bids=56753.104322&type=2&subid=0";
  cat_ad_tracking_srcs[5] = "http://ad.linksynergy.com/fs-bin/show?id=kcowBcROGIM&bids=56753.104332&type=2&subid=0";
  
  var cat_ad_prices = new Array();
  cat_ad_prices[0] = "$48.99";
  cat_ad_prices[1] = "$49.99";
  cat_ad_prices[2] = "$67.99";
  cat_ad_prices[3] = "$68.99";
  cat_ad_prices[4] = "$130.98";
  cat_ad_prices[5] = "$132.98";

  var cat_ad_image = "<img id=\"cat_ad_image\" border=0 src=\"" + cat_ad_image_srcs[cat_ad] + "\" >";
  var cat_ad_url = cat_ad_urls[cat_ad];
  var cat_ad_tracking = "<img id=\"cat_ad_tracking\" border=0 width=1 height=1 src=\"" + cat_ad_tracking_srcs[cat_ad] + "\" >";
  var cat_inner_html_buy = "Buy For ";
  var cat_ad_price = cat_inner_html_buy + cat_ad_prices[cat_ad];
  var cat_ad_copy = "Advantage Stops Fleas From Biting In 3-5 Minutes, Kills 98-100 Percent Of Fleas Within 12 Hours Of Application, Kills Re-infesting Fleas Within Two Hours And Lasts Up To A Month. Kills Fleas Before They Lay Eggs. One Treatment Prevents Further Infestation For At Least Four Weeks. 12 Topical Monthly Treatments.";
  
  function change_cat_select()
  {
    var cat_select = document.getElementById("cat_select");
    var value = cat_select.value;
    if (!isNaN(value))
    {
      var img = document.getElementById("cat_ad_image");
      img.src = cat_ad_image_srcs[value];
      var tracking = document.getElementById("cat_ad_tracking");
      tracking.src = cat_ad_tracking_srcs[value];	
      var anchor = document.getElementById("cat_ad_url");
      anchor.href = cat_ad_urls[value];
      anchor.innerHTML = cat_inner_html_buy + cat_ad_prices[value];
    }
  }
  
  function create_cat()
  {
    document.write("<table border=\"0\">\n");
    document.write("  <tr>\n");
    document.write("    <td>" + cat_ad_image + " " + cat_ad_tracking + "</td>\n");
    document.write("    <td>" + cat_ad_copy + "</td>\n");
    document.write("  </tr>\n");
    document.write("</table>\n");

    document.write("<p align=center>\n");
    document.write("  <select id=\"cat_select\" name=\"cat_select\" onchange=\"change_cat_select()\">\n");
    document.write("    <option id=\"cat_select_0\" value=\"0\">Advantage 4pk Cat Orange 1-9 Lbs</option>\n");
    document.write("    <option id=\"cat_select_1\" value=\"1\">Advantage 4pk Cat Purple 10 Lbs and Over</option>\n");
    document.write("    <option id=\"cat_select_2\" value=\"2\">Advantage 6pk Cat Orange 1-9 Lbs</option>\n");
    document.write("    <option id=\"cat_select_3\" value=\"3\">Advantage 6pk Cat Purple 10 Lbs And Over</option>\n");
    document.write("    <option id=\"cat_select_4\" value=\"4\">Advantage 12pk Cat Orange 1-9 Lbs</option>\n");
    document.write("    <option id=\"cat_select_5\" value=\"5\">Advantage 12pk Cat Purple 10 Lbs And Over</option>\n");
    document.write("  </select>\n");
    document.write("</p>\n");

    document.getElementById("cat_select_" + cat_ad).selected="selected";
    document.write("<p align=center><a id=\"cat_ad_url\" href=\"" + cat_ad_url + "\" target=\"new\">" + cat_ad_price + "</a><\p>\n");
  }