Jquery: Binding change to multiple checkboxes

For a little bit of background, I have multiple checkboxes, each weighted with a different "score". When the checkbox is changed, I need to compute the score. I thought something like the following would work but it does not look like the .change event is being bound properly.

$(document).ready(function() {
   bindSomeCheckboxes();
});

function bindSomeCheckboxes() {
    var score=0;
    var checkboxes = {
        "id_1" : 3,
        "id_2" : 1,
        "id_3" : 2,
        "id_4" : 5
    };

    $.each(checkboxes, function(key, value) {
        $("#"+key).change(function(key,value) {
            if ($("#"+key).is(':checked')) {
                //add this ids value to score
            } else {
                //subtract value from score
            }
        });
    });
}  

I know that it is looping through the array correctly, but an alert in .change is never being seen.