referencing a multiple select box with an array name

<script LANGUAGE="JavaScript">
<!--
function copyToList(from,to){
fromList = eval('document.forms[0].' + from);
toList = eval('document.forms[0].' + to);
if(toList.options.length >0&& toList.options[0].value == 'temp'){
toList.options.length =0;
}var sel =false;
for(i=0;i<fromList.options.length;i++){var current = fromList.options[i];
if(current.selected){
sel =true;
if(current.value == 'temp'){
alert ('You cannot move this text!');
return;
}
txt = current.text;
val = current.value;
toList.options[toList.length]=new Option(txt,val);
fromList.options[i]=null;
i--;
}}if(!sel) alert ('error');
}function allSelect() {
List = document.forms[0].chosen.selectedIndex;
if(List.length && List.options[0].value == 'temp')return;
for(i=0;i<List.length;i++) {
List.options[i].selected =true;
}}
// -->
</SCRIPT>

<form onSubmit="allSelect(); return" method="post">
<p>From:<br>
<select NAME="possible" SIZE="8" MULTIPLE>
<option value="1">One</option>
<option value="2">Two</option>
</select>

<aHREF="javascript:copyToList('possible','chosen')">Add to Booking</a><br>
<aHREF="javascript:copyToList('chosen','possible')">Remove from Booking</a>
<p>To:<br>
<select NAME="chosen" SIZE="8" MULTIPLE>
<option VALUE="temp">Make your choice on the left
</select>
<input TYPE=submit>

</form>