Eingabefeld per Dropdown aktivieren/deaktivieren

[Kaster]

...

<select name="optionsauswahl" size="1" onchange="check(this); return false;">

...

<script type="text/javascript">
//<!--
function check(obj){
 var aussenopt = document.Dropdown.Aussenoption;
 if (obj.value == "sbez0") {
  aussenopt.disabled = false;
 } else {
  aussenopt.disabled = true;
 }
}
// -->
</script>

Kaster