Oops - there it... should be ;)

[toby]

sorry... mein fehler:

<form action="index.html" name="bestellung1" onSubmit="return formtest();">
 <input type="checkbox" name="agb">
 <br>
 <input type="submit" name="submit" value="abschicken">
</form>
<script language="Javascript">
 function formtest()
 {
  if (document.forms["bestellung1"].elements["agb"].checked != true)
  {
       document.forms["bestellung1"].elements["agb"].focus();
       return false;
  }
       //sonst Form absenden
       else
  {
     //document.forms["bestellung1"].submit();
     return true;
  }
 }
</script>