eval is your friend (using the word friend in its loosest form :)

<script language="javascript">
    var arr = new Array('one','two');
    var lb = "\x5B";
    var rb = "\x5D" 
    var code =  "alert(\"Second element is \"+arr"+lb+"1"+rb+")";
    eval(code);
</script>
[download]

:)

cLive ;-)