var fDesc=new Array();
fDesc[0] = "MathGrapher is the mathematical graphing program specifically designed for students, scientists and engineers. With this program students can draw and analyse functions and data in 2D and 3D, draw surface graphs, contour plots and cross-sections through contour plots. The MathGrapher includes linear and nonlinear curve fitting, integration and analysis of coupled ordinary differential equations, iteration and analysis of multi-dimensional maps and matrix operations.";

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 = '';
	}
}