var fDesc=new Array();
fDesc[0] = "The Gestational Age Calculator derives the Estimated Date of Delivery (EDD) and length of gestation from:<br /> <br /> -Last Menstrual Period (LMP) or<br /> -ultrasound scan measurement of<br /> -crown rump length <br /> -biparietal diameter <br /> -head circumference";

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 = '';
	}
}