var fDesc=new Array();
fDesc[0] = "Calculate expressions, e.g, sqrt((2 3) / 4.56). This is a calculator which enables you to see exactly what you are doing. Simplify your calculations, and easily save them for later use. You can use an unlimited number of brackets. Trigonometry, logarithms, inverse, square, square root, power, etc.";

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 = '';
	}
}