function chkFormular() {
 if (document.submit_form.receivername.value == "") {
   document.getElementById("display").innerHTML = "<span style='color:red;'>Bitte Ihren Namen eingeben!</span>";
   document.submit_form.receivername.focus();
   return false;
 }

 if (document.submit_form.receiveremail.value == "") {
   document.getElementById("display").innerHTML = "<span style='color:red;'>Bitte Ihre E-Mail-Adresse eingeben!</span>";
   document.submit_form.receiveremail.focus();
   return false;
 }

 if (document.submit_form.termsofuse.checked == false) {
  document.getElementById("display").innerHTML = "<span style='color:red;'>Bitte bestätigen Sie die Nutzungsbedingungen!</span>";
   document.submit_form.termsofuse.focus();
   return false;
   }
document.submit_form.save.disabled = true;
document.getElementById("back").style.display = "none";
document.getElementById("display").innerHTML = "<span style='color:green;'>Einen Moment bitte...</span>";
}