var b_playing = false;

function launch_game()  {
	
	if (b_playing) {
		alert('Game already running, please close the game and reload the page to start again');
		return;
	}
		
	var str_game_package = 'ml|sandstone:game|American Dynasties|1';
	var str_user_name = 'Student';
	var str_player_name = 'Player|Anna';
	var n_width = 1680;
	var n_height = 1050;
	b_playing = true;
	
	objShim.StartLocalGame(str_game_package, str_user_name, str_player_name, n_width, n_height);
}