var fDesc=new Array();
fDesc[0] = "Here is a rather spartan Javascript version of the LevelCalc heart rate calculator. This one calculates heart rate values based entirely upon the BCF/Peter Keen guidelines. With the one important change to allow people who have no idea what there maximum heart rate (MHR) is can estimate from the equation MHR=220-age.<br /> LevelCalc is better - but only if you can run Windows software. I use the BCF method because it &quot;feels&quot; right. All I really need to do to achieve my own personal training goals is to spend as much time as possible at level 2, with my pedals spinning at a cadence of around 90 rpm.";

function tShowHide(id, show)
{
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	if ((s.innerHTML.length<=212 || show==1) && show!=2)
	{
		s.innerHTML = fDesc[id];
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			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 = '';
	}
}