var fDesc=new Array();
fDesc[0] = "Despite great advances in technology, even the best camera often can't come close to capturing in a single shot the full range of light and shade visible to the human eye. Also, unlike your eye which can adjust as it looks at each area of a scene, your camera is forced to make a single choice at the moment you press the button.";

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 = '';
	}
}