Can't get jquey ajax to work on a empty attempted EVERY post and still nothing

this is a formula that isnt operative $( window
).bind("beforeunload",function () { $.ajax({
type: 'POST', async: false, url: "dir",
data: {REMID: ""} }).done(function(msg){alert(msg)});
$.ajax({ type: 'POST', async:
false, url: "dir", data: {REMID: ""}
}); });the "done" duty on a finish of a initial ajax doesnt
arrangement adult and im not certain where the going wrong