$(function(){
    $('form.public_racecourse_combo :input[name="filterBtn"]').livequery(function(){
        $(this).hide();
    });
    $('form.public_racecourse_combo :input[name="cmbRacecourses"]').livequery("change", function () {
        $('form.public_racecourse_combo').submit();
    });
    
 });