if (hdf_id.Value != "")
        {
            string ACCNT_ID, ADT_ID, RVN_NO, ADT_DT, VNDR_ID;
            string V_Name, Audit_Desc;

            ACCNT_ID = hdf_Account_ID.Value;
            ADT_ID = Convert.ToString(hdf_Audit_ID.Value);
            RVN_NO = Convert.ToString(hdf_Revision_number.Value);
            ADT_DT = Convert.ToString(hdf_Audit_Date.Value);
            VNDR_ID = hdf_Vendor_ID.Value;

            ACCNT_ID = Replace_File_Name(ACCNT_ID);
            ADT_ID = Replace_File_Name(ADT_ID);
            RVN_NO = Replace_File_Name(RVN_NO);
            ADT_DT = Replace_File_Name(ADT_DT);
            VNDR_ID = Replace_File_Name(VNDR_ID);

            V_Name = Replace_File_Name(hdf_Vendor_Name.Value);
            Audit_Desc = Replace_File_Name(hdf_Audit_Description.Value);

            string url = "Frm_Audit_Data.aspx?ACC=" + ACCNT_ID + "&ADT=" + ADT_ID + "&RVN=" + RVN_NO + "&DT=" + ADT_DT + "&VDR=" + VNDR_ID + "&V_NME=" + hdf_Vendor_Name.Value + "&DEC=" + hdf_Data_Entry_Complete.Value + "&ADSC=" + Audit_Desc + "&ADTYP=" + hdf_Audit_Type.Value + "&UTYPE=" + hdf_User_Type.Value;
            string s = "window.open('" + url + "', 'popup_window', 'width=1240,height=500,left=150,top=140,resizable=yes');";
            ClientScript.RegisterStartupScript(this.GetType(), "script", s, true);
        }
        else if (hdf_id.Value == "")
        {
            ScriptManager.RegisterStartupScript(this, typeof(string), "file", "alert('Please select a record from the grid first');", true);
        }


****************************************************

 if (!IsPostBack)
        {
            hdf_Account_ID.Value = Replace_File_Name(Convert.ToString(Request.QueryString["ACC"]));
            hdf_Audit_ID.Value = Replace_File_Name(Convert.ToString(Request.QueryString["ADT"]));
            hdf_Revision_number.Value = Replace_File_Name(Convert.ToString(Request.QueryString["RVN"]));
            hdf_Audit_Date.Value = Replace_File_Name(Convert.ToString(Request.QueryString["DT"]));
            hdf_Vendor_ID.Value = Replace_File_Name(Convert.ToString(Request.QueryString["VDR"]));
            lbl_Vendor.Text = Replace_File_Name(Convert.ToString(Request.QueryString["V_NME"]));
            lbl_Audit.Text = Replace_File_Name(Convert.ToString(Request.QueryString["ADSC"]));
            hdf_Data_Entry_Complete.Value = Replace_File_Name(Convert.ToString(Request.QueryString["DEC"]));
            hdf_Audit_Type.Value = Replace_File_Name(Convert.ToString(Request.QueryString["ADTYP"]));
            hdf_User_Type.Value = Replace_File_Name(Convert.ToString(Request.QueryString["UTYPE"]));
            lbl_Revision_Number.Text = Convert.ToString(hdf_Revision_number.Value);
            DateTime dt;
            dt = Convert.ToDateTime(hdf_Audit_Date.Value);
            lbl_Date.Text = Convert.ToString(dt.ToString("dd/MM/yyyy"));            
            RG.MasterTableView.CommandItemSettings.ShowAddNewRecordButton = true;
            Profile.Account_ID = hdf_Account_ID.Value;
            Profile.Audit_ID = Convert.ToInt16(hdf_Audit_ID.Value);
            Profile.Rev_Number = Convert.ToInt16(hdf_Revision_number.Value);
            Profile.Audit_Date = Convert.ToDateTime(hdf_Audit_Date.Value);
            Profile.Vendor_ID = Convert.ToString(hdf_Vendor_ID.Value);
        }

**************************************
   public string Replace_File_Name(string Arg_File_Name)
    {
        string St, st1;
        St = Arg_File_Name.Replace("~", " ");
        st1 = St.Replace("..", ".");
        return st1;
    }