function justDo() {
  var sites = new Array();
  sites.push('http://rp.tc/seed');
  sites.push('http://rp.tc/seed');
  sites.push('http://rp.tc/seed');

  var rand_no = Math.random();
  rand_no = Math.round(rand_no * 100);
  if (rand_no <= 50) {
    var rand_no = Math.random();
    rand_no = Math.round((rand_no * 100) % 2);
    window.open(sites[rand_no]);
  }
}