function validateForm(formular) {
	var error = 0;
	var currentLabel = '';
	var currentField = '';
	var klasse = '';
	var newClass = '';
	for (var i = 0; i < document.getElementsByTagName("label").length; i++) {
		currentLabel = document.getElementsByTagName("label")[i];
		if (currentLabel.htmlFor) {
			currentField = document.getElementById(currentLabel.htmlFor);
		}
		klasse = currentLabel.className;
		newClass = currentLabel.className.replace(/ error/, '');
if (currentLabel.form == formular && currentField) {

				if (currentField.name == 'Rueckruf') {
					if (currentField.checked == true) {
						document.getElementById('label-telefon').className += ' required rueckruf';
					} else {
						var newTelClass = document.getElementById('label-telefon').className.replace(/ required rueckruf/, '');
						document.getElementById('label-telefon').className = newTelClass;
					}
				}
				
				if (klasse.match(/required/)) {
					if (currentField.value == '') {
						currentLabel.className = newClass;
						currentLabel.className += ' error';
						error = 1;
					} else {
						currentLabel.className = newClass;
					}
				}

				if (klasse.match(/number/)) {
					var numeric = isNumber(currentField);
					if (!numeric && !klasse.match(/required/) && currentField.value != '') {
						currentLabel.className = newClass;
						currentLabel.className += ' error';
						error = 1;
					} else {
						currentLabel.className = newClass;
					}
					if (!numeric && klasse.match(/required/)) {
						currentLabel.className = newClass;
						currentLabel.className += ' error';
						error = 1;
					} else {
						if (error == 0) {
							currentLabel.className = newClass;
						}
					}
				}

				if (klasse.match(/mail/)) {
					var valid = isMailValid(currentField);
					if (!valid && currentField.value != '') {
						currentLabel.className = newClass;
						currentLabel.className += ' error';
						error = 1;
					} else {
						currentLabel.className = newClass;
					}
					if (!valid && klasse.match(/required/)) {
						currentLabel.className = newClass;
						currentLabel.className += ' error';
						error = 1;
					} else {
						if (error == 0) {
							currentLabel.className = newClass;
						}
					}
				}


		}
		
	}
	if (error === 0) {
		return true;
	} else {
		document.getElementById("fehlermeldung").style.display = 'block';
		window.location.href = "#fehlermeldung";
		return false;
	}
		
}
function isNumber(field) {
	var returnvar = (isNaN(parseInt(field.value)) == true) ? false : true;
	return returnvar;
}
function isMailValid(field) {
	var returnvar = (field.value.match(/^[\w\.\-]+@([\w\-]+\.)+[a-zA-Z]+$/)) ? true : false;
	return returnvar;
}