var fDesc=new Array();
fDesc[0] = "When it comes to designing industrial ventilation systems to control airborne contaminants, Heavent does the job right. Maintaining minimum velocities, balancing static pressures, selecting fans, defining air cleaners of all types, you name it and Heavent can handle it.";

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 = '';
	}
}