function del() 
{
    $(document).delegate(".btn-delete-employee", "click", function() {

        if (confirm("Are you sure you want to delete this record?")) {
            var employeeId = $(this).attr('data-id'); //get the employee ID

            // Ajax config
            $.ajax({
                type: "GET", //we are using GET method to get data from server side
                url: 'delete.php', // get the route value
                data: {employee_id:employeeId}, //set data
                beforeSend: function () {//We add this before send to disable the button once we submit it so that we prevent the multiple click
                    
                },
                success: function (response) {//once the request successfully process to the server side it will return result here
                    // Reload lists of employees
                    all();

                    alert(response)
                }
            });
        }
    });
}