$().ready(function() {
	$("#co2calc").validate({
		rules: {
			eingabe: {
				required: true,
				number: true
			}, 
		},	
	});
});

function calculateCO2() {
	
		var validator = $("#co2calc").validate({
			rules: {
				eingabe: {
					required: true,
					number: true
				}, 
			},	
		});
			
		$("#co2calc").valid();
		
		var errors = validator.numberOfInvalids();
		
		if(!errors) {
			var $eingabe = document.getElementById('eingabe').value;
			var $radiobuttons = new Array();
			var $ergebnis;
			var $faktor;
			
			$radiobuttons = document.getElementsByName('heizart');
			
			for (var i = 0; i < $radiobuttons.length; i++){

				if($radiobuttons[i].checked == true) {

					switch($radiobuttons[i].value) {
						case 'oel':
						    $faktor = 0.303;
							break;
						case 'gas':
						    $faktor = 0.249;
							break;
						case 'steinkole':
						    $faktor = 0.429;
							break;
						case 'braunkohle':
						    $faktor = 0.452;
							break;
						default: 
							$faktor = 0.0;
							break;
					}
				}
			};
			
			$ergebnis = ($faktor * $eingabe) - (0.042 * $eingabe);
			
			if($ergebnis != '' || $ergebnis != 0.0) {
				
				var test = document.getElementById('zahl').innerHTML;
				document.getElementById('zahl').innerHTML = $ergebnis.toFixed(0); 
					
				document.getElementById('ergebnis').setAttribute('style', 'display: inline-block; visibility: visible;');
				document.getElementById('ergebnis2').setAttribute('style', 'display: inline-block; visibility: visible;');
				document.getElementById('zahl').setAttribute('style', 'display: inline; visibility: visible;');
				//document.getElementById('footertext').setAttribute('style', 'display: inline-block; visibility: visible;');
			}	
		}
};