Bind different ASP.Net GridView based on QueryString value using C#

  function openWindow(Date) {
      if(Date=="1/1/2018") 
      {
          window.open('FirstPageaspx?Date=' + Date, 'open_window');
      }
  }


  My Firstpage.aspx.cs code as follows

  protected void BindGrid1()
    {
        DataSet ds = new DataSet();
        DataTable dt;
        DataRow dr;
        DataColumn pDate; ;
        DataColumn pLocation;
        DataColumn pTimein;
        DataColumn pTimeout;
        DataColumn PHours;
        int i = 0;
        dt = new DataTable();
        pDate = new DataColumn("Date", Type.GetType("System.String"));
        pLocation = new DataColumn("Location", Type.GetType("System.String"));
        pTimein = new DataColumn("TimeIn", Type.GetType("System.String"));
        pTimeout = new DataColumn("TimeOut", Type.GetType("System.String"));
        PHours = new DataColumn("WorkingHours", Type.GetType("System.String"));

        dt.Columns.Add(pDate);
        dt.Columns.Add(pLocation);
        dt.Columns.Add(pTimein);
        dt.Columns.Add(pTimeout);
        dt.Columns.Add(PHours);

        dr = dt.NewRow();
        dr["Date"] = "1/1/2018";
        dr["Location"] = "Chennai";
        dr["TimeIn"] = "9.30";
        dr["TimeOut"] = "6.30";
        dr["WorkingHours"] = "9";
        dt.Rows.Add(dr);

        dr = dt.NewRow();
        dr["Date"] = "2/1/2018";
        dr["Location"] = "Chennai";
        dr["TimeIn"] = "9.30";
        dr["TimeOut"] = "7.30";
        dr["WorkingHours"] = "10";
        dt.Rows.Add(dr);

        dr = dt.NewRow();
        dr["Date"] = "3/1/2018";
        dr["Location"] = "Chennai";
        dr["TimeIn"] = "10.30";
        dr["TimeOut"] = "6.30";
        dr["WorkingHours"] = "8";
        dt.Rows.Add(dr);

        dr = dt.NewRow();
        dr["Date"] = "4/1/2018";
        dr["Location"] = "Chennai";
        dr["TimeIn"] = "10.00";
        dr["TimeOut"] = "8.00";
        dr["WorkingHours"] = "10";
        dt.Rows.Add(dr);

        dr = dt.NewRow();
        dr["Date"] = "5/1/2018";
        dr["Location"] = "Chennai";
        dr["TimeIn"] = "9.30";
        dr["TimeOut"] = "7.30";
        dr["WorkingHours"] = "10";
        dt.Rows.Add(dr);

        ds.Tables.Add(dt);
        GridView1.DataSource = ds.Tables[0];
        GridView1.DataBind();
    }
       

    protected void BindGrid2()
    {
        DataSet ds1 = new DataSet();
        DataTable dt1;
        DataRow dr1;
        DataColumn pDate; ;
        DataColumn pLocation;
        DataColumn pTimein;
        DataColumn pTimeout;
        DataColumn PHours;
        int i = 0;
        dt1 = new DataTable();
        pDate = new DataColumn("Date", Type.GetType("System.String"));
        pLocation = new DataColumn("Location", Type.GetType("System.String"));
        pTimein = new DataColumn("TimeIn", Type.GetType("System.String"));
        pTimeout = new DataColumn("TimeOut", Type.GetType("System.String"));
        PHours = new DataColumn("WorkingHours", Type.GetType("System.String"));

        dt1.Columns.Add(pDate);
        dt1.Columns.Add(pLocation);
        dt1.Columns.Add(pTimein);
        dt1.Columns.Add(pTimeout);
        dt1.Columns.Add(PHours);

        dr1 = dt1.NewRow();
        dr1["Date"] = "8/1/2018";
        dr1["Location"] = "Chennai";
        dr1["TimeIn"] = "9.30";
        dr1["TimeOut"] = "6.30";
        dr1["WorkingHours"] = "9";
        dt1.Rows.Add(dr1);

        dr1 = dt1.NewRow();
        dr1["Date"] = "9/1/2018";
        dr1["Location"] = "Chennai";
        dr1["TimeIn"] = "9.30";
        dr1["TimeOut"] = "7.30";
        dr1["WorkingHours"] = "10";
        dt1.Rows.Add(dr1);

        dr1 = dt1.NewRow();
        dr1["Date"] = "10/1/2018";
        dr1["Location"] = "Chennai";
        dr1["TimeIn"] = "10.30";
        dr1["TimeOut"] = "6.30";
        dr1["WorkingHours"] = "8";
        dt1.Rows.Add(dr1);

        dr1 = dt1.NewRow();
        dr1["Date"] = "11/1/2018";
        dr1["Location"] = "Chennai";
        dr1["TimeIn"] = "10.00";
        dr1["TimeOut"] = "8.00";
        dr1["WorkingHours"] = "10";
        dt1.Rows.Add(dr1);

        dr1 = dt1.NewRow();
        dr1["Date"] = "12/1/2018";
        dr1["Location"] = "Chennai";
        dr1["TimeIn"] = "9.30";
        dr1["TimeOut"] = "7.30";
        dr1["WorkingHours"] = "10";
        dt1.Rows.Add(dr1);

        ds1.Tables.Add(dt1);
        GridView1.DataSource = ds1.Tables[0];
        GridView1.DataBind();
    }



My code as follows

function openWindow(Date) {
    if(Date=="1/1/2018") 
    {
         window.open('FirstPageaspx?Date=' + Date, 'open_window');
    }
}

for that how to do. from my above code i want to do like this  if date is 1/1/2018 Call the BindGrid1. suppose if date is 8/1/2018 Call the BindGrid2. do the above changes in javascript