function showFra() {
	document.getElementById('dim-fra-entry').style.display = 'block';
	document.getElementById('dim-mm-entry').style.display = 'none';
	document.getElementById('dim-fra-sel').parentNode.className = 'active';
	document.getElementById('dim-mm-sel').parentNode.className = '';
	document.getElementById('dim-fra-entry-val2').value = '';
	document.getElementById('dim-mm-entry-val1').value = '';
	document.getElementById('dim-mm-entry-val2').value = '';
	document.getElementById('results-con').style.display = 'none';
	document.getElementById('results-con').style.innerHTML = '';
}
function showMm() {
	document.getElementById('dim-fra-entry').style.display = 'none';
	document.getElementById('dim-mm-entry').style.display = 'block';		
	document.getElementById('dim-fra-sel').parentNode.className = '';
	document.getElementById('dim-mm-sel').parentNode.className = 'active';
	document.getElementById('dim-fra-entry-val2').value = '';
	document.getElementById('dim-mm-entry-val1').value = '';
	document.getElementById('dim-mm-entry-val2').value = '';
	document.getElementById('results-con').style.display = 'none';
	document.getElementById('results-con').style.innerHTML = '';
}
function checkFra() {
	document.getElementById('results-con').style.display = 'block';
	document.getElementById('results').innerHTML = (Math.round((document.getElementById('dim-fra-entry-val1').value/document.getElementById('dim-fra-entry-val2').value)*100)/100);
	return false;
}
function checkMm() {
	document.getElementById('results-con').style.display = 'block';
	document.getElementById('results').innerHTML = (Math.round(Math.sqrt(Math.pow(document.getElementById('dim-mm-entry-val1').value,2)+Math.pow(document.getElementById('dim-mm-entry-val2').value,2))*0.0393700787*100)/100);
	return false;
}