var fDesc=new Array();
fDesc[0] = "This software operates only with Windows (98, Millenium, 2000, XP, Vista and 7)<br /> - It is recommended to update your system (Windows Update) prior this installation.<br /> - You computer must have a sound card.<br /> - The display definition of you computer must be at least 1204 x 768 pixels. If it is not the case you can use the video version (for MAC and Linux) of DistEns lectures if they ara avalaible. More details here.";

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 = '';
	}
}