var fDesc=new Array();
fDesc[0] = "PIDSim is an educational simulator for examining the behavior of PID control applied to canal check gates. The programs algorithms contain many gross assumptions, so the software is not suitable for actual design of controllers. It was developed by the Bureau of Reclamations of the US Department of Interior.";

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 = '';
	}
}