问ajax data.success代码块未执行(变量值)

EN

$(document).on('click', '.overtime_send', function() {
   temp = 0;
  $('#employee_table tbody tr').each(function(row, tr) {

    var emp_no = $(tr).find('td:eq(0)').text();
    var ot_hours = $(tr).find('input').val();

    //ot_array.push([emp_no,ot_hours]);

    $.ajax({
      url: 'otrequset_action.php',
      type: 'POST',
      data: { action:'add_ot',emp_no : emp_no, ot_hours:ot_hours},
      dataType:"json",
      success:function(data)
      {
        if(data.success)
        {
         swal("Good job!", "OverTime Request Send Successfully!", "success");
         temp = 1;
         dataTable.ajax.reload();  
        }
      }
    });  
  });
  alert(temp);//data.success alert display but value is still 0  
  if (temp == 1) {
$.ajax({
      url: 'otrequset_action.php',
      type: 'POST',
      data: { action:'add_comment'},
      dataType:"json",
      success:function(data)
      {
        if(data.success)
        {  
         dataTable.ajax.reload();
        }
      }
    });
}
     swal({title: "No data entering?",text: "Not set the overtime hours !",type: "warning"});

});