javascript - Variable undefined when waking from sleep in Chrome -

using mac os x 10.8.4, chrome 27 (latest stable).

i have script every x seconds (with setinterval()) makes ajax call jquery see if there's still connection server (heartbeat). posts data , depending on if succeeded or not, calls other functions.

it works fine until mac goes sleep (screen black, hdd powers down, etc.), wake , ajax call failed , tried call function (variable) apparently no longer exists:

post http://mywebsite.com/index.php  jquery.min.js:4 uncaught typeerror: cannot call method 'onlost' of undefined 

onlost function within other variables, such mylib , anotherlib. instantiated in loading page. code lot more complex, here's simplified version:

var mylib = new mylib();  mylib.anotherlib = function() { this.onlost = function() { ... }}  setinterval() { function() { $.ajax({ failed: mylib.anotherlib.onlost }); }, 10000); 

after error occurs, script behaves normal. can access mylib , onlost() fine. know browsers implement settimeout() , setinterval() when computer sleeps differently (doesn't chrome pause or slow down or something?), it's still odd error.

could way i'm calling failed or how jquery's $.ajax() thing?