I've been playing with the multiple address look up API from blockchain info (documented here https://blockchain.info/api/blockchain_api), I had my code working earlier in the day but bizzarely it's stopped.

The purpose of it is to eventually write a little JQuery library which will search the DOM for bitcoin addresses as data attributes and then insert the final balance into that element creating a polling mechanism to keep the page updated as well.

The original problem I ran into earlier while developing it was because it's a CORS ajax request but later I adjusted the query per the blockchain info API documents and I added cors=true it then seemed to work fine but now it doesn't seem to want to work at all again. I don't get how changing computers would effect this kind of request.

Here's my code on JSFiddle, http://jsfiddle.net/SlyFoxy12/9mr7L/7/

My primary code is:

     (function ($) {

        var methods = {
            init: function(data, options) {
                //put your init logic here.
            },
            query_addresses: function(addresses) {
                var addresses_implode = addresses.join("|");

                $.getJSON("http://blockchain.info/multiaddr?cors=true&active="+addresses_implode, function( data ) {
                    $.each( data.addresses, function( index ) {
                        $('#output').append(" "+data.addresses[index].final_balance);
                    });
                });
            }
        };

        $.fn.bitstrap = function () {
            var addresses = new Array();

            $('[data-xbt-address]').each(function () {
                $(this).text($(this).data('xbtAddress'));
                addresses.push($(this).data('xbtAddress'));
            });

            methods.query_addresses(addresses);
        }

    }(jQuery));

    $().ready(function() {
        $().bitstrap();
    });