var fDesc=new Array();
fDesc[0] = "Mouse Mischief is a free program that integrates into Microsoft PowerPoint 2010 and Microsoft Office PowerPoint 2007, letting you insert questions, polls and drawing activity slides into your lessons. The program allows you to actively engage your students creating a collaborative learning environment.";

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 = '';
	}
}