var fDesc=new Array();
fDesc[0] = "VICON CCTV Lens Calculator has been developed to make the task of selecting the correct size of Lens easier. Now almost anyone in the industry can make a confident choice. It can also be used to give a representation of the image that will be viewed with a given size of Lens, on a Dome camera for instance. To use the Calculator, you need to have a few details available before you start.";

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 = '';
	}
}