function setActiveCap()
{
	if (document.getElementById('scfmbutton'))
	{
		if (document.getElementById('scfmbutton').checked)
		{
			document.getElementById('capmmcf').readOnly = true;
			document.getElementById('capmmcf').style.backgroundColor = '#eeeeee';
			document.getElementById('capmmcf').style.color = '#aaaaaa';
			document.getElementById('capscfm').readOnly = false;
			document.getElementById('capscfm').style.backgroundColor = '#ffffff';
			document.getElementById('capscfm').style.color = '#000000';
		}
		else
		{
			document.getElementById('capmmcf').readOnly = false;
			document.getElementById('capmmcf').style.backgroundColor = '#ffffff';
			document.getElementById('capmmcf').style.color = '#000000';
			document.getElementById('capscfm').readOnly = true;
			document.getElementById('capscfm').style.backgroundColor = '#eeeeee';
			document.getElementById('capscfm').style.color = '#aaaaaa';
		}
	}
	
	return true;
}

function toggleCapType()
{
	if (document.getElementById)
   	document.getElementById('captype').disabled = document.getElementById('optionb').checked;
}

function updateSCFM()
{
	if (document.getElementById('capscfm') && document.getElementById('capmmcf'))
		document.getElementById('capscfm').value = Math.round(document.getElementById('capmmcf').value / 24 / 60);

	return true;
}

function updateMMCF()
{
	if (document.getElementById('capscfm') && document.getElementById('capmmcf'))
		document.getElementById('capmmcf').value = Math.round(document.getElementById('capscfm').value * 60 * 24);

	return true;
}

function init()
{
	setActiveCap();
	updateMMCF();

	return true;
}

window.onload = init;