var fDesc=new Array();
fDesc[0] = "This is a tic tac toe game against the computer. You and the computer take turns to mark a 3 x 3 grid with your own mark, if 3 consecutive marks are formed, the game is won. You shall play a total of 20 games to determine your final score.";

function tShowHide(id, show)
{
	var s = document.getElementById("desc");

	if ((s.innerHTML.length<=212 || show==1) && show!=2)
	{
		s.innerHTML = fDesc[id];
		if (document.getElementById('m1'))
			document.getElementById('m1').style.display='none';
		if (document.getElementById('m2'))
			document.getElementById('m2').style.display='none';
		if (document.getElementById('more_txt'))
			document.getElementById('more_txt').style.display='inline';
	}
	else
	{
		s.innerHTML = '';
	}
}