var fDesc=new Array();
fDesc[0] = "PyraNum is a simple math puzzle. You complete a pyramid of numbers by filling in blank positions given three rules: a cell value must be sum or difference of the two cells below, a row cannot have duplicate numbers, a number cannot be less than one or more than the grid size.";

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 = '';
	}
}