how to associate star rating system with a link

[eluser]oursteps[/eluser]
I am trying to integrate star rating plugin(http://www.fyneworks.com/jquery/star-rating/) with my code.

for example:

Code:

$(function() {
       $('.auto-submit-star').rating({
            required: true,
            callback: function(value, link) {

            $.ajax({
                     type: "post",
                     url: site_url + "user/view/star",
                     dataType: "json",
                     data: "&video;=" + $('#video_url').val() + "&rate;_val=" + value,

              success: function(e) {
                   $.jGrowl(e.code + "<br>" + e.msg);
               }
         });
     }
});

But I don't understand what the parameter "link" is?

how can I associate the script with an item to be rated? (i.e. the system need to know which item is being rated...)

anyone can help me?

Thanks.