if (top.frames.length > 0) {
   top.location.href=self.location;
}
function ChkKontaktform() {
         if (document.kontaktform.absender.value == "") {
            alert("Please type in your name!");
            document.kontaktform.absender.focus();
            return false;
         }
         if (  (document.kontaktform.email.value.indexOf('@') == -1)
             ||(document.kontaktform.email.value.indexOf('.') == -1)  ) {
            alert("Your email adress is not valid!");
            document.kontaktform.email.focus();
            return false;
         }
         if (document.kontaktform.message.value == "") {
            alert("Please type in your message!");
            document.kontaktform.message.focus();
            return false;
         }
}