<!DOCTYPE HTML>
<html>
  <head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <script>
  window.onload=function(){
  var q = document.getElementsByName('q');
  for (var i=0; i < q.length; i++){
    if (q[i].innerHTML == '1'|| q[i].innerHTML =='2'){
      document.getElementById('gofor').onclick=function(){
        alert ('не прокатило');
      };
      return;
    };
  };
  document.getElementById('gofor').onclick=function() {alert("Прокатило")};
}
  </script>
  </head>
  <body>
  <a name="q">3</a><br>
  <a name="q">4</a><br>
  <a name="q">5</a><br>
  <a name="q">6</a><br>
  <a name="q">7</a><br>
  <input type="button" id="gofor" value="Тык">
  </body>
</html>
<!DOCTYPE HTML>
<html>
  <head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <script>
  window.onload=function(){
  var q = document.getElementsByName('q');
  for (var i=0; i < q.length; i++){
    if (q[i].innerHTML == '1'|| q[i].innerHTML =='2'){
      document.getElementById('gofor').onclick=function(){
        alert ('не прокатило');
      };
      return;
    };
  };
  document.getElementById('gofor').onclick=function() {alert("Прокатило")};
}
  </script>
  </head>
  <body>
  <a name="q">1</a><br>
  <a name="q">2</a><br>
  <a name="q">3</a><br>
  <a name="q">4</a><br>
  <a name="q">5</a><br>
  <a name="q">6</a><br>
  <a name="q">7</a><br>
  <input type="button" id="gofor" value="Тык">
  </body>
</html>