说您已使用不同的按钮关注HTML标记

Say You have following HTML MARKUP with Different Buttons

 <input type='button' name='button1' class='capture' />
 <input type='button' name='button2' class='capture' />
 <input type='button' name='button3' class='capture' />

当单击一个按钮时，您将获得按钮的名称，并将其发送到服务器以通过以下ajax调用写入日志文件.假设服务器端有PHP

And when a button is clicked you get name of button and send it to server to write on logfile with following ajax call. Assuming you have PHP on server side

 $(".capture").click(function(){

    var buttnName=$(this).attr('name');
    $.ajax({
      type:"POST",
      data:"ClickedButton="+buttonName, 
      url: "server.php",
      success: function(data){

      alert('Written in Log File');
    }
    }); // END Ajax 
    });

server.php中的

以下代码将用于在日志文件上写入

in server.php following code will be used to write on log file

  $myFile = "logfile.txt"; \\Considering the text file in same directory where server.php is
  $fh = fopen($myFile, 'w') or die("can't open file");
  $stringData =$_POST['ClickedButton'] ;
  fwrite($fh, $stringData);
  fclose($fh);

不简单吗? 注意:为此您需要使用jQuery