private void btn_getSal_Click(object sender, EventArgs e)
        {
            Main.p1.Controls.Clear();
            Get_Sallery View_pay = new Get_Sallery();

            View_pay.TopLevel = false;
            View_pay.Visible  = true;
            Main.p1.Controls.Add(View_pay);
        }
        private void receivedSalaryToolStripMenuItem_Click(object sender, EventArgs e)
        {
            panelMain.Controls.Clear();
            Get_Sallery View_pay = new Get_Sallery();

            View_pay.TopLevel = false;
            View_pay.Visible  = true;
            panelMain.Controls.Add(View_pay);
        }