jquery ajax done function not firing

Question

I have a VERY simple jQuery Ajax call (below). The Ajax call executes and I can see in the Firebug Net panel that the server returned 200 OK and returned a string \"OK\" as

Answer 1

You need to chain the done() and fail() functions, they are not part of the options object used in $.ajax :

$.ajax({
    type: "POST", 
    url : postUrl,
    data: dataToPost
}).done(function()  {
    alert("Success.");
}).fail(function()  {
    alert("Sorry. Server unavailable. ");
}); 

Also, as ajax is asynchronous, don't be suprised if the "after" alert comes before the "success" alert.