<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
 <script>
  function go(dan){
   for(var i=1;i<10;i++){
    document.write(dan + 'X' +i +'=' +  i*dan +'<br>');
   }
  }
 </script>
 </HEAD>

 <BODY>
  <p onclick="go(2);">2단출력</p>
  <p onclick="go(3);">3단출력</p>
  <p onclick="go(4);">4단출력</p>

 </BODY>
</HTML>