// Pure JavaScript errors handler
window.addEventListener('error', function (err) {
    var lineAndColumnInfo = err.colno ? ' line:' + err.lineno +', column:'+ err.colno : ' line:' + e.lineno;
    _gaq.push([
        '_trackEvent',
        'JavaScript Error',
        err.message,
        err.filename + lineAndColumnInfo + ' -> ' +  navigator.userAgent,
        0,
        true
    ]);
});