如何正确处理点击事件，按钮的事件没有't显示警报

我正在尝试按钮的Onclick事件，但它没有显示警报。有人能建议我如何正确处理点击事件吗。

function sendGetData () {   
    $.ajax({
         type: 'GET',
         url: 'Refresh',
         success: function (data) {
             var trHTML = '';
             $.each(data, function (i, item) {
                 if(data[i].test_progress=="Complete")
                     {
           var buttonVar = ('<button id="btn11">'+"Clicking"+'</button>');                   
                    $("#btn11").click(function(){
                                    alert("The paragraph was not clicked."+i);
                                });
                     }
                 else
                     {
                    var buttonVar = ('<button   id="btn12">'+"Stoping"+'</button>');
                    $("#btn12").click(function(){
                                    alert("The paragraph was not clicked."+i);
                                });
                     }
                 trHTML += '<tr><td>' + data[i].test_type + 
                 '</td><td>' + data[i].device_id + 
                 '</td><td>' + data[i].make + '&nbsp'+data[i].model+
                 '</td><td>' + data[i].stack_name +
                 '</td><td>' + data[i].suite_name + 
                 '</td><td>' + data[i].test_progress + '<br>&nbsp&nbsp&nbsp&nbsp'+data[i].tests_run+'/'+data[i].total_tests+
                 '</td><td>' + data[i].start_time + 
                 '</td><td>' + data[i].end_time +
                 '</td><td>' + buttonVar +
                 '</td></tr>';
                });
             $('#test1').append(trHTML);
             $('#test').hide();
             $('#show').show();       
         }
     });
    }