function trackError(msg, url, line)
{
    if (blistEnv != 'production')
    { alert('Tracking error at ' + url + ': ' + msg + ':' + line); }
    if (blistEnv == 'staging' || blistEnv == 'production')
    {
        try
        {
            $.ajax({
                data: {
                    date: new Date(),
                    message: msg,
                    url: url,
                    line: line
                },
                global: false,
                type: 'POST',
                url: '/errors'
            })
        }
        catch(ignore) {}
    }
};

if (blistEnv != 'development')
{
    // We'd like to catch errors on events; but jQuery 1.4 changed error handling,
    // and we can no longer easily wrap everything by hooking proxy.
    // So this feature is taken out for now

    // override jQuery.ready to wrap every $(function() {}); or
    // $(document).ready(function() {});
    var jQueryReady = jQuery.fn.ready;
    jQuery.fn.ready = function(fn) {
        var origFn = fn;
        var wrappedFn = function() {
            try
            {
                origFn.apply(this, arguments);
            }
            catch(ex)
            {
                trackError(ex.message, ex.fileName, ex.lineNumber);
                if (blistEnv != 'production') { throw ex; }
            }
        };
        fn = wrappedFn;

        return jQueryReady.call(this, wrappedFn);
    }

    // Attach trackError to window's onerror event;
    // use onerror instead of $(window).error( ... ) in order to get url and lineNo
    window.onerror = function(msg, url, lineNo)
    {
        trackError(msg, url, lineNo);
        return blistEnv == 'production';
    }
}