var fDesc=new Array();
fDesc[0] = "The Surface Area Calculator is a tool for easily calculating surface and planimetric areas, as well as volumes.<br /> The extent and shape of the area in question are given in terms of the coordinates of a number of points throughout the area. <br /> <br /> These coordinates can be specified as either latitude, longitude, and height, as GPS coordinates (geocentric Cartesian X, Y, Z coordinates), or as local x, y coordinates and height, and the coordinates can be supplied in virtually any text file format.";

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 = '';
	}
}