var fDesc=new Array();
fDesc[0] = "A simple calculator to help choosing resistor and capacitor values to get the frequency you're looking for on a 555 timer. The Frequency text is in scientific notation and often has so many decimal places that it cuts off the power so it's difficult to know whether 4.2 is 42 or 4.2 or 4200 Hz.";

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 = '';
	}
}