json loader (no name structure)

gistfile1.js

function loadContent(sources, callback) {
        var contents = {};
        var loadedContents = 0;
        var numContents = 0;
        
        for (var src in sources)
            numContents++;
            
        for (var src in sources) {
            $.getJSON(sources[src], function(data) {
                contents[count] = data;
                if (++loadedContents >= numContents) {
                    callback(contents);
                }
                count ++;
            });
        }
    }