protected void btnNewGame_Click(object sender, EventArgs e)
 {
     game.NewGame();
     btnCol1.Enabled    = true;
     btnCol2.Enabled    = true;
     btnCol3.Enabled    = true;
     btnCol4.Enabled    = true;
     btnCol5.Enabled    = true;
     btnCol6.Enabled    = true;
     btnCol7.Enabled    = true;
     btnCol1.CssClass   = "tileBtn";
     btnCol2.CssClass   = "tileBtn";
     btnCol3.CssClass   = "tileBtn";
     btnCol4.CssClass   = "tileBtn";
     btnCol5.CssClass   = "tileBtn";
     btnCol6.CssClass   = "tileBtn";
     btnCol7.CssClass   = "tileBtn";
     lblResult.CssClass = null;
     tblBoard.Rows.Clear();
     printBoard();
     lblResult.Text = "";
 }