var root = 'http://www.metricconversioncharts.org/calculators/';

function GoToCategory(category){window.location.href= root + category + '/';}

function GoToCalculator(category)
{
	var fromUrl = document.getElementById(category + '-from').value;
	var toUrl = document.getElementById(category + '-to').value;
	if (fromUrl == toUrl)
	{
		alert('Please choose a different unit to convert to.');
		return;
	}
	else window.location.href = root + category + "/from-" + fromUrl + "to-" + toUrl;
}