Javascript running on mobile safari whilst iphone is locked

My webapp is currently sending an AJAX request every 5 seconds. Is it possible to allow it to continue doing this even when the iPhone is locked?

At present is seems like the javascript is paused when the phone is locked and r开发者_如何学运维esumed when it's unlocked again.

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The entire application (mobile safari) will pause itself when it goes into the background. What you're asking is not possible on IOS unless you roll your own app.