(rails question) placing link_to inside javascript tags? Options

Hey everyone,
I'm wondering if anyone has tried to use the link_to function inside
<script> tags in a view? I'm using facebox to create a lightbox
effect
on a link. I want to place this inside a javascript function so I can
use it via a button in a js form. Here's what I would like to do, but
I'm not sure if it's possible. Has anyone done this before? I'm
thinking I might have to dig into facebox to see how to pass what I
want using pure javascript. I'm not a javascript programmer, so a
rails approach would be easier for me.
Here's what I would like to do...
<script type="text/javascript">
  function test(com,grid) {
    if (com=='Delete') {
      confirm('Delete ' + $('.trSelected',grid).length + ' items?')
    }
    else if (com=='Add') {
      <%=facebox_link_to "+New Reading", :url => 'readings/
new', :method=>'get'%>;
    }
    else {
      alert('Test')
    }
  }
</script>
Any help is appreciated.
Chris