function returnBMR ()
{
	//inputSelector
	var height_scale_i = $F('bmr_height_scale_i');
	var height_scale_m = $F('bmr_height_scale_m');
	var age = $F('age');

	var gender = 'unknown';
	var frm = document['bmr_form'];
	if ($('gender_m').checked) gender = 'm';
	else if ($('gender_f').checked) gender = 'f';

	var weight = '';
	var height = '';
	var inches = '';
	var height_scale = '';

	if (height_scale_i == 'i')
	{
		weight = $F('bmr_weight_i');
		height = $F('bmr_height_i');
		inches = $F('bmr_height_inches');
		height_scale = 'i';
	}
	else if (height_scale_m == 'm')
	{
		weight = $F('bmr_weight_m');
		height = $F('bmr_height_m');
		height_scale = 'm';
	}

	var pars = 'weight='+weight+'&height='+height+'&inches='+inches+'&scale='+height_scale+'&gender='+gender+'&age='+age;
	var url = '/tools/bmr/bmr.php';

	var myAjax = new Ajax.Request(
	url,
	{
		method: 'get',
		parameters: pars,
		onComplete: showBMR
	});
}

function showBMR(originalRequest)
{
	$('bmr').innerHTML = originalRequest.responseText;
	$('bmr_results').style.display = 'block';
}

function changeheightbmr(measurementSystem)
{
	var hide_id = '';
	var show_id = '';

	if (measurementSystem == 'i')
	{
		show_id = 'metric_';
		hide_id = 'imperial_';
	}
	else
	{
		show_id = 'imperial_';
		hide_id = 'metric_';
	}

	document.getElementById('bmr_'+hide_id+'height').style.display = 'none';
	document.getElementById('bmr_'+show_id+'height').style.display = 'block';

	document.getElementById('bmr_'+hide_id+'weight').style.display = 'none';
	document.getElementById('bmr_'+show_id+'weight').style.display = 'block';

}