window.jsReportedErrorsCount = 0;

window.onerror = function(errorMsg, file, lineNr) {

    /*
        These exceptions are a result of a server error and should be ignored
        by the JS error handler since they are already logged server-side.
    */
    if (errorMsg.indexOf('Server Ajax Error')>=0)
        return true;

    //Set a repoting limit count to prevent error handler from going haywire.
    if(window.jsReportedErrorsCount > 100)
        return;

    var reportUrl = '/reportJsError.php'; //Our server-side JavaScript error collector
    var reportUrlArgs = "?errorMsg="+encodeURIComponent(errorMsg); //Set the error message
        reportUrlArgs += "&errorFile="+encodeURIComponent(file); //Set the file the error occured in
        reportUrlArgs += "&errorLineNr="+encodeURIComponent(lineNr); //Set the line nr the error occured at
        reportUrlArgs += "&" + encodeURIComponent(Math.random()); //Add a random number to prevent caching

    //Construct JS include URL
    var url = "https://airnet.org.au"+reportUrl+reportUrlArgs; //FIXME home URL should be set!

    /*
        This adds a JS include to the page.
        So far this appears to be the most reliable way to report errors to our server.
    */
    $("head").append(
        $("<script>")
            .attr('type', 'text/javascript')
            .attr('src', url)
    );

    //Increment error counter
    window.jsReportedErrorsCount++;

    //Tell browser to show the error in the console
    return false;
};