var fDesc=new Array();
fDesc[0] = "The Visualization Toolkit (VTK) is an open-source, freely available software system for 3D computer graphics, image processing, and visualization. It consists of a C class library and several interpreted interface layers including Tcl/Tk, Java, and Python.";

function tShowHide(id, show)
{
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	{
		s.innerHTML = fDesc[id];
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	else
	{
		s.innerHTML = '';
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}