function checkContactConstraints()
{
	var mandatoryError = "";
	var contactString = "";
	
	if(document.contactForm.name.value == "")
	{
		mandatoryError += "Name\n";
	}
	if(document.contactForm.email.value == "")
	{
		mandatoryError += "E-Mail\n";
	}
	if(document.contactForm.anliegen.value == "")
	{
		mandatoryError += "Nachricht\n";
	}
	
	
	if(mandatoryError != "")
	{
		mandatoryError = "Bitte füllen Sie diese Felder aus:\n" + mandatoryError;
		alert(mandatoryError);
		return false;
	}
	
	document.contactForm.kontakt.value = contactString;
		
	return true;
}