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 = "";
}