url-picker-hack.html

<label for="ospicker">Choose OS</label>
<select id="ospicker">
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/fedora/fedora-23-x86_64/pgdg-fedora95-9.5-3.noarch.rpm">Fedora 23 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/fedora/fedora-22-x86_64/pgdg-fedora95-9.5-3.noarch.rpm">Fedora 22 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-7-x86_64/pgdg-redhat95-9.5-2.noarch.rpm">Red Hat Enterprise Linux 7 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-7-x86_64/pgdg-sl95-9.5-2.noarch.rpm">Scientific Linux 7 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-7-x86_64/pgdg-centos95-9.5-2.noarch.rpm">CentOS 7 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-7-x86_64/pgdg-oraclelinux95-9.5-2.noarch.rpm">Oracle Enterprise Linux 7 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-x86_64/pgdg-redhat95-9.5-2.noarch.rpm">Red Hat Enterprise Linux 6 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-i386/pgdg-redhat95-9.5-2.noarch.rpm">Red Hat Enterprise Linux 6 - i386</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-x86_64/pgdg-centos95-9.5-2.noarch.rpm">CentOS 6 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-i386/pgdg-centos95-9.5-2.noarch.rpm">CentOS 6 - i386</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-x86_64/pgdg-sl95-9.5-2.noarch.rpm">Scientific Linux 6 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-i386/pgdg-sl95-9.5-2.noarch.rpm">Scientific Linux 6 - i386</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-x86_64/pgdg-oraclelinux95-9.5-2.noarch.rpm">Oracle Enterprise Linux 6 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-i386/pgdg-oraclelinux95-9.5-2.noarch.rpm">Oracle Enterprise Linux 6 - i386</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-x86_64/pgdg-ami201503-95-9.5-2.noarch.rpm">Amazon Linux AMI 2015.03 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-6-i386/pgdg-ami201503-95-9.5-2.noarch.rpm">Amazon Linux AMI 2015.03 - i386</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-5-x86_64/pgdg-redhat95-9.5-2.noarch.rpm">Red Hat Enterprise Linux 5 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-5-i386/pgdg-redhat95-9.5-2.noarch.rpm">Red Hat Enterprise Linux 5 - i386</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-5-x86_64/pgdg-sl95-9.5-2.noarch.rpm">Scientific Linux 5 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-5-i386/pgdg-sl95-9.5-2.noarch.rpm">Scientific Linux 5 - i386</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-5-x86_64/pgdg-centos95-9.5-2.noarch.rpm">CentOS 5 - x86_64</option>
  <option value="https://download.postgresql.org/pub/repos/yum/9.5/redhat/rhel-5-i386/pgdg-centos95-9.5-2.noarch.rpm">CentOS 5 - i386</option>
</select>
<script>
document.addEventListener("DOMContentLoaded", function(event) {
  $("#ospicker").change(function () {
    var url = $(this).val();
    $("pre:contains('repository-url')").each(function() {
        var text = $(this).text();
        $(this).text(text.replace('repository-url', url)); 
    });
  });
});
</script>