Javascript ist Toll!

<script type="text/javascript">
function alle() {
   var f = document.forms;
   if(f){
       var akt = null;
       for(var i = 0; akt = f[i++];){
           var el = null;
           for(var j = 0; el = akt.elements[j++]; )
           if(el.options){
              var o = null;
              for(var k = 0; o = el.options[k++]; )o.selected = true;
           }
       }
   }
   return false;
}
</script>

<script type="text/javascript"> function alle() { var f = document.forms; if(f){ var akt = null; for(var i = 0; akt = f[i++];){ var el = null; for(var j = 0; el = akt.elements[j++]; ) if(el.options){ var o = null; for(var k = 0; o = el.options[k++]; )o.selected = true; } } } return false; } </script>