function checkMailFormular(form) {
  var error = false;
  var errorMsg = '';
  
  if(form.meno.value == '') {
    error = true;
    errorMsg += '\n * Name';
  }
  
  if(form.telefon.value == '') {
    error = true;
    errorMsg += '\n * Telefonnumer';
  }
  
  if(form.email.value == '') {
    error = true;
    errorMsg += '\n * Email Adresse';
  } else {
    if(window.RegExp)
    {
      re = new RegExp("^(([a-zA-Z0-9_\.\+\-]+@([a-zA-Z0-9_\+\-]+[\.]{1})+[a-zA-Z]{2,4}|(\"[^\"]{0,64}\")* *<[a-zA-Z0-9_\.\+\-]+@([a-zA-Z0-9_\+\-]+[\.]{1})+[a-zA-Z]{2,4}>|[^\"\(\)\<\>\@\,\;\:\\\.\[]{0,64} *<[a-zA-Z0-9_\.\+\-]+@([a-zA-Z0-9_\+\-]+[\.]{1})+[a-zA-Z]{2,4}>) *,{0,1} *)+$");
      if (!re.test(form.email.value)) {
        error = true;
        errorMsg += '\n * Email Adresse';
      }
    }
  }
  
  if(form.sprava.value == '') {
    error = true;
    errorMsg += '\n * Anfrage/Frage';
  }
  
  if(error) {
    alert('Bitte ergänzen Sie Ihre Angaben:' + errorMsg);
    return false;
  }
}