Check if connected to a network; jQuery

Question

I have searched through StackOverflow and have seen various topics on how to do this, but nothing that really pertains to my particular situation. I am writing (for a class)

Answer 1

I'm using the following code to check for connectivity. NOTE: none of the solutions above work for Firefox, which relies on its internal 'Work Offline' status:

// Register listeners
window.addEventListener("offline", function(){
    $('#globalDiv').hide();
    $("#message").html('WARNING: Internet connection has been lost.').show();
});
window.addEventListener("online", function(){
    $("#message").empty().hide();
    $('#globalDiv').show();
});