[jQuery] PHP variable into jQuery

[choffman]

Hello,
I have a form where the values are pulled from MySQL and looped
through using PHP. The name and id values are create dynamically.

For example HTML:
Item A <input type="checkbox" name="event_id_22" id="eid_22" / >
Item B <input type="checkbox" name="event_id_23" id="eid_23" / >

For example PHP:
Item A <input type="checkbox" name="event_id_$value" id="eid_$value" /
>
Item B <input type="checkbox" name="event_id_$value" id="eid_$value" /
>

I'm using jQuery to count the boxes that get checked.  How can I get
jQuery to see my PHP variable so it can count the number of boxes that
get checked?  Thoughts?

$(document).ready(function() {
        $("#eid_??").click(function() {
                        if (this.checked == true) {
                                var event_id = $("#eid_??").length;
                                $("#eventItems").text(event_id);
                        }

                        if (this.checked == false) {
                                $("#eventItems").empty();
                        }
        });
});