ColorBox on Page ends

I'm trying to load my ColorBox when I reach the end of page but I really dont get a clue of what I'm doing, I've read all the documentation and the only thing I've found took me to write something like this;

<script>
    $(document).ready(function() {
        $(".subscriber").colorbox({

            inline: true,
            onComplete: false,
            width: "50%"
        });
    });

</script>

It doesn't do anything... could anyone please give me a hand?...