var fDesc=new Array();
fDesc[0] = "Lurch is a word processor with the ability to check the steps of your work in many areas of mathematics, from calculus to logic.<br /> <br /> Main features:<br /> <br /> - TeX-enabled word processor<br /> - built on OpenMath for <br /> - unambiguous semantics<br /> - JavaScript engine for customizing validation<br /> - several math topics built in<br /> - users can add new math topics";

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 = '';
	}
}