JScript pass value

[IS]

Hi folks,

Any ideas why this doesn't work?

<SCRIPT LANGUAGE="JavaScript">
<!--
f = document.forms[1];
e = f.elements;
str = new String(e[0].value);
len = document.forms['testform'].d.options.length;
document.forms['testform'].d.options[len] = new Option(str, '1');
</script>

Basicaly, I am trying to fill my combo box on a HTML page (SELECT OPTION field) manually, but the vallue I get every time is 'null', i.e. empty string.
*Suspected error in the red line, since if I put in the last line "....new Option('some','1');" it works.

I must have made some ridiculous error I can't see, so plz be free to make fun of me :))

Thanks in advance.
IS