[azolkin]

<p><strong id='test'>Click here</strong></p>
<script>
  var counter = 0;
  document.getElementById('test').onclick = function () { 
    if (counter == 0) {
      counter = 1;
      alert('11111');
    }
    else {
      counter = 0;
      alert('22222');
    }
  }
</script>