List Boxes

[Nate]

I need to be able to move (or copy) data from one list box to another when
a button is clicked.

I am having a problem with the recognition of the Options object. Here is
the code below:

<script>

function fromPartiesToPlaintiff()
{

var index = document.frmRelatedParties.selParties.selectedIndex;
var text = document.frmRelatedParties.selParties.options[index].text;
var value = document.frmRelatedParties.selParties.options[index].value;
var len = document.frmRelatedParties.selPlaintiff.length;

var new_element= document.createElement("option");
new_element.text = text;
new_element.value = value;
new_element.selected=true;
document.frmRelatedParties.selPlaintiff.options[len]=new_element;

}

</script>

<form name=frmPlaintiff>
<input type=button name=addPlaintiff value="Add Plaintiff --->>>" onClick="fromPartiesToPlaintiff()">
</form>

I get an error in the function when this line is reached:
document.frmRelatedParties.selPlaintiff.options[len]=new_element;

Any ideas????

TIA
Nate

[Michael]

Nate,
you get the selected option from the list as,

document.frmRelatedParties.selParties.options[document.frmRelatedParties.selParties.selectedIndex].value

Let me know if you have any questions,
Michael

"Nate" <nkane@enak.com> wrote:
>
>I need to be able to move (or copy) data from one list box to another when
>a button is clicked.
>
>I am having a problem with the recognition of the Options object. Here is
>the code below:
>
><script>
>
>function fromPartiesToPlaintiff()
>{
>
>var index = document.frmRelatedParties.selParties.selectedIndex;
>var text = document.frmRelatedParties.selParties.options[index].text;
>var value = document.frmRelatedParties.selParties.options[index].value;
>var len = document.frmRelatedParties.selPlaintiff.length;
>
> var new_element= document.createElement("option");
> new_element.text = text;
> new_element.value = value;
> new_element.selected=true;
> document.frmRelatedParties.selPlaintiff.options[len]=new_element;
>
>}
>
></script>
>
><form name=frmPlaintiff>
><input type=button name=addPlaintiff value="Add Plaintiff --->>>" onClick="fromPartiesToPlaintiff()">
></form>
>
>I get an error in the function when this line is reached:
>document.frmRelatedParties.selPlaintiff.options[len]=new_element;
>
>Any ideas????
>
>TIA
>Nate