どこでも更新

refresh.jquery.js

$.fn.extend({
    refresh: function(selector, url){
        var that = $(this);
        $.ajax({
            url: url || location.href,
            type: 'GET',  
            success: function(res) {
                content = $(res).find(selector || that.selector).html();
                $(that).each(function(){
                    $(this).html(content);
                });
            },
            error: function(){
            }
        });
    }
});

// example
$('.class #id').refresh();