Question

I have a server (mysite.com/status), which returns number of active tasks (just a single integer).
How can I check number of active tasks each 10 seconds with JavaScript and show user something like:

Number of remaining tasks: XXX

And, if number of tasks is 0, then I should load another page.

Answer 1

Make a function set a new timeout calling itself.

function checkTasks(){
    // Make AJAX request
    setTimeout(checkTasks, 10000);
}
checkTasks(); // Start task checking