var fDesc=new Array();
fDesc[0] = "The nav-u Tool software is required to install system software updates and map data files to the nav-u navigation system.<br /> <br /> This is an updated version of the nav-u Tool that was originally available on the nav-u Application Software disc included with the NV-U73T and NV-U83T, and that was previously available for download for those and other models.";

function tShowHide(id, show)
{
	var s = document.getElementById("desc");

	if ((s.innerHTML.length<=212 || show==1) && show!=2)
	{
		s.innerHTML = fDesc[id];
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			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 = '';
	}
}